diff --git a/fields.go b/fields.go
index c875bcc..4dc8d6a 100644
--- a/fields.go
+++ b/fields.go
@@ -100,7 +100,24 @@ func validateFieldsV0(publiccode PublicCode, parser *Parser, network bool, baseU
 			}
 		}
 
+		if publiccodev0.IntendedAudience.Scope != nil {
+			for i, scope := range *publiccodev0.IntendedAudience.Scope {
+				if scope == "government" {
+					vr = append(vr, newValidationWarning(
+						fmt.Sprintf("intendedAudience.scope[%d]", i),
+						"The 'government' scope is DEPRECATED and will be removed in the future. It's safe to drop it",
+					))
+				}
+			}
+		}
+
 		if publiccodev0.IntendedAudience.UnsupportedCountries != nil {
+			vr = append(vr, newValidationWarning(
+				"intendedAudience.unsupportedCountries",
+				"This key is DEPRECATED and will be removed in the future. "+
+					"Use 'intendedAudience.countries' to list the targeted countries instead",
+			))
+
 			for i, c := range *publiccodev0.IntendedAudience.UnsupportedCountries {
 				if sharedValidate.Var(c, "iso3166_1_alpha2_lower_or_upper") == nil && c == strings.ToLower(c) {
 					vr = append(vr, newValidationWarningf(
@@ -112,6 +129,21 @@ func validateFieldsV0(publiccode PublicCode, parser *Parser, network bool, baseU
 		}
 	}
 
+	if publiccodev0.Maintenance.Contacts != nil {
+		for i, contact := range *publiccodev0.Maintenance.Contacts {
+			if contact.Phone == nil || *contact.Phone == "" {
+				continue
+			}
+
+			if sharedValidate.Var(*contact.Phone, "e164") != nil {
+				vr = append(vr, newValidationWarning(
+					fmt.Sprintf("maintenance.contacts[%d].phone", i),
+					"Phone numbers SHOULD use the E.164 format, e.g. '+3923113215112'",
+				))
+			}
+		}
+	}
+
 	if publiccodev0.Legal.AuthorsFile != nil {
 		vr = append(vr, newValidationWarning(
 			"legal.authorsFile",
@@ -147,6 +179,20 @@ func validateFieldsV0(publiccode PublicCode, parser *Parser, network bool, baseU
 		))
 	}
 
+	if publiccodev0.DependsOn != nil && publiccodev0.DependsOn.Open != nil {
+		vr = append(vr, newValidationWarning(
+			"dependsOn.open",
+			"This key is DEPRECATED and will be removed in the future. It's safe to drop it",
+		))
+	}
+
+	if publiccodev0.UsedBy != nil {
+		vr = append(vr, newValidationWarning(
+			"usedBy",
+			"This key is DEPRECATED and will be removed in the future. It's safe to drop it",
+		))
+	}
+
 	if publiccodev0.OutputTypes != nil {
 		vr = append(vr, newValidationWarning(
 			"outputTypes",
@@ -198,6 +244,14 @@ func validateFieldsV0(publiccode PublicCode, parser *Parser, network bool, baseU
 			}
 		}
 
+		if len(desc.Videos) > 0 {
+			vr = append(vr, newValidationWarning(
+				fmt.Sprintf("description.%s.videos", lang),
+				"This key is DEPRECATED and will be removed in the future. "+
+					"Link videos from the documentation or the website instead",
+			))
+		}
+
 		for i, v := range desc.Videos {
 			err := parser.checkOEmbedURL((*url.URL)(v))
 			if err != nil {
diff --git a/parser.go b/parser.go
index dd669af..bba7191 100644
--- a/parser.go
+++ b/parser.go
@@ -363,6 +363,19 @@ func (p *Parser) parseAndValidate(in io.Reader, fileURL *url.URL) (PublicCode, e
 		validateFields = validateFieldsV0
 
 		decodeResults = decode(b, v0, file)
+
+		if isBasedOnIsString(file) {
+			line, column := getPositionInFile("isBasedOn", file)
+
+			ve = append(ve, ValidationWarning{
+				Key: "isBasedOn",
+				Description: "The single string form is DEPRECATED and will be removed in the future. " +
+					"Use a one element array instead",
+				Line:   line,
+				Column: column,
+			})
+		}
+
 		publiccode = v0
 	} else {
 		v1 := &PublicCodeV1{}
@@ -523,6 +536,30 @@ func getPositionInFile(key string, file *ast.File) (int, int) {
 	return line, col
 }
 
+// isBasedOnIsString reports whether the top level isBasedOn is a single
+// string. It has to look at the AST because UrlOrUrlArray folds both forms
+// into a slice, losing which one was used.
+func isBasedOnIsString(file *ast.File) bool {
+	if len(file.Docs) == 0 {
+		return false
+	}
+
+	root, ok := file.Docs[0].Body.(*ast.MappingNode)
+	if !ok {
+		return false
+	}
+
+	for _, mv := range root.Values {
+		if tok := mv.Key.GetToken(); tok != nil && tok.Value == "isBasedOn" {
+			_, isString := mv.Value.(*ast.StringNode)
+
+			return isString
+		}
+	}
+
+	return false
+}
+
 // splitKeyParts splits a dot-separated key path into parts, preserving array
 // indices. Eg. "a.b[0].c" -> ["a", "b[0]", "c"].
 func splitKeyParts(key string) []string {
diff --git a/testdata/v0/invalid/it_IT_duplicated.yml b/testdata/v0/invalid/it_IT_duplicated.yml
index 7d1b10e..1932cdb 100644
--- a/testdata/v0/invalid/it_IT_duplicated.yml
+++ b/testdata/v0/invalid/it_IT_duplicated.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -30,8 +30,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
diff --git a/testdata/v0/invalid/it_wrong_case.yml b/testdata/v0/invalid/it_wrong_case.yml
index 859dda7..aa2da46 100644
--- a/testdata/v0/invalid/it_wrong_case.yml
+++ b/testdata/v0/invalid/it_wrong_case.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -30,8 +30,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
diff --git a/testdata/v0/invalid/landingURL_invalid.yml b/testdata/v0/invalid/landingURL_invalid.yml
index d73e47e..9c49213 100644
--- a/testdata/v0/invalid/landingURL_invalid.yml
+++ b/testdata/v0/invalid/landingURL_invalid.yml
@@ -7,7 +7,7 @@ url: "https://github.com/italia/developers.italia.it.git"
 # Should not validate: landingURL must be a valid URL
 landingURL: "???"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -32,8 +32,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -82,15 +80,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@comune.reggioemilia.it"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
diff --git a/testdata/v0/invalid/landingURL_wrong_type.yml b/testdata/v0/invalid/landingURL_wrong_type.yml
index d569bca..36394a3 100644
--- a/testdata/v0/invalid/landingURL_wrong_type.yml
+++ b/testdata/v0/invalid/landingURL_wrong_type.yml
@@ -7,7 +7,7 @@ url: "https://github.com/italia/developers.italia.it.git"
 # Should not validate: landingURL must be a string
 landingURL: []
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -32,8 +32,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -78,15 +76,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@comune.reggioemilia.it"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
diff --git a/testdata/v0/invalid/no-network/landingURL_invalid.yml b/testdata/v0/invalid/no-network/landingURL_invalid.yml
index 7a907ea..9c2f27a 100644
--- a/testdata/v0/invalid/no-network/landingURL_invalid.yml
+++ b/testdata/v0/invalid/no-network/landingURL_invalid.yml
@@ -7,7 +7,7 @@ url: "https://github.com/italia/developers.italia.it.git"
 # Should not validate: landingURL must be a valid URL
 landingURL: "???"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -32,8 +32,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -82,15 +80,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@comune.reggioemilia.it"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
diff --git a/testdata/v0/valid/assets/img/logo.webp b/testdata/v0/valid/assets/img/logo.webp
new file mode 100644
index 0000000..e69de29
diff --git a/testdata/v0/valid/assets/img/sshot.avif b/testdata/v0/valid/assets/img/sshot.avif
new file mode 100644
index 0000000..e69de29
diff --git a/testdata/v0/valid/assets/img/sshot.jpeg b/testdata/v0/valid/assets/img/sshot.jpeg
new file mode 100644
index 0000000..e69de29
diff --git a/testdata/v0/valid/assets/img/sshot.jpg b/testdata/v0/valid/assets/img/sshot.jpg
new file mode 100644
index 0000000..e69de29
diff --git a/testdata/v0/valid/assets/img/sshot.webp b/testdata/v0/valid/assets/img/sshot.webp
new file mode 100644
index 0000000..e69de29
diff --git a/testdata/v0/valid/countryExtensionVersion_1.0.yml b/testdata/v0/valid/countryExtensionVersion_1.0.yml
index 280fd1e..2e6b8df 100644
--- a/testdata/v0/valid/countryExtensionVersion_1.0.yml
+++ b/testdata/v0/valid/countryExtensionVersion_1.0.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -16,10 +16,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -30,8 +26,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -59,8 +53,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos:
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -84,14 +76,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid/dependsOn.yml b/testdata/v0/valid/dependsOn.yml
index 26fa26b..3e1f74a 100644
--- a/testdata/v0/valid/dependsOn.yml
+++ b/testdata/v0/valid/dependsOn.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git" # URL of this repository
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git" # The original repository, "Otello"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"] # The original repository, "Otello"
 softwareVersion: "1.0" # Last stable version
 releaseDate: 2017-04-15 # Date of last stable software release
 # monochromeLogo: assets/icons/dt-logo.svg
@@ -17,10 +17,6 @@ platforms: # or Windows, Mac, Linux, etc.
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -31,8 +27,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries: # Explicitly unsupported countries
-    - US
 
 description:
   en:
@@ -60,8 +54,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos: # Demo videos of the software
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -87,14 +79,6 @@ localisation:
     - de
 
 dependsOn: # List of dependencies. The only mandatory list is the proprietary one
-  open: # List of open dependencies. Optional
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   # List of proprietary software which is a dependency for using this product. This includes runtime dependencies
   proprietary:
     - name: Oracle
diff --git a/testdata/v0/valid/image_formats.yml b/testdata/v0/valid/image_formats.yml
new file mode 100644
index 0000000..9bbfc65
--- /dev/null
+++ b/testdata/v0/valid/image_formats.yml
@@ -0,0 +1,57 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+logo: assets/img/logo.webp
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    screenshots:
+      - assets/img/sshot.avif
+      - assets/img/sshot.jpg
+      - assets/img/sshot.jpeg
+      - assets/img/sshot.webp
+    features:
+       - Just one feature
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
diff --git a/testdata/v0/valid/no-network/valid.yml b/testdata/v0/valid/no-network/valid.yml
index 240fc05..bd5a931 100644
--- a/testdata/v0/valid/no-network/valid.yml
+++ b/testdata/v0/valid/no-network/valid.yml
@@ -8,7 +8,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 logo: assets/img/logo.png
@@ -121,10 +121,6 @@ categories:
   - website-builder
   - workflow-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -135,8 +131,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -168,8 +162,6 @@ description:
       - assets/img/sshot1.png
       - assets/img/sshot2.png
       - assets/img/sshot3.png
-    videos:
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -189,15 +181,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@example.org"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@example.org"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@example.org"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
@@ -209,14 +201,6 @@ localisation:
     - sl-IT-nedis
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid/valid.yml b/testdata/v0/valid/valid.yml
index d74a567..d210bb6 100644
--- a/testdata/v0/valid/valid.yml
+++ b/testdata/v0/valid/valid.yml
@@ -8,7 +8,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -124,10 +124,6 @@ categories:
   - website-builder
   - workflow-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -138,8 +134,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -167,8 +161,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos:
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -192,15 +184,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@example.org"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@example.org"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@example.org"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
@@ -212,14 +204,6 @@ localisation:
     - sl-IT-nedis
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid/valid_no_it_conforme.yml b/testdata/v0/valid/valid_no_it_conforme.yml
index 71638ed..398d2e3 100644
--- a/testdata/v0/valid/valid_no_it_conforme.yml
+++ b/testdata/v0/valid/valid_no_it_conforme.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -16,10 +16,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -30,8 +26,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -59,8 +53,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos:
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -84,14 +76,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid/valid_with_country_specific_section_uppercase.yml b/testdata/v0/valid/valid_with_country_specific_section_uppercase.yml
index 892d818..7141d04 100644
--- a/testdata/v0/valid/valid_with_country_specific_section_uppercase.yml
+++ b/testdata/v0/valid/valid_with_country_specific_section_uppercase.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -16,10 +16,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -30,8 +26,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -59,8 +53,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos:
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -84,14 +76,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid_with_warnings/maintenance_contacts_phone_not_e164.yml b/testdata/v0/valid_with_warnings/maintenance_contacts_phone_not_e164.yml
new file mode 100644
index 0000000..700d048
--- /dev/null
+++ b/testdata/v0/valid_with_warnings/maintenance_contacts_phone_not_e164.yml
@@ -0,0 +1,51 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    features:
+       - Just one feature
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+      phone: "+39 231 13215112"
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
diff --git a/testdata/v0/valid_with_warnings/no-network/authorsFile.yml b/testdata/v0/valid_with_warnings/no-network/authorsFile.yml
index 20b9ddd..e2e638a 100644
--- a/testdata/v0/valid_with_warnings/no-network/authorsFile.yml
+++ b/testdata/v0/valid_with_warnings/no-network/authorsFile.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git" # URL of this repository
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git" # The original repository, "Otello"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"] # The original repository, "Otello"
 softwareVersion: "1.0" # Last stable version
 releaseDate: 2017-04-15 # Date of last stable software release
 # monochromeLogo: assets/icons/dt-logo.svg
@@ -17,10 +17,6 @@ platforms: # or Windows, Mac, Linux, etc.
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -31,8 +27,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries: # Explicitly unsupported countries
-    - US
 
 description:
   en:
@@ -60,8 +54,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos: # Demo videos of the software
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -88,14 +80,6 @@ localisation:
     - de
 
 dependsOn: # List of dependencies. The only mandatory list is the proprietary one
-  open: # List of open dependencies. Optional
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   # List of proprietary software which is a dependency for using this product. This includes runtime dependencies
   proprietary:
     - name: Oracle
diff --git a/testdata/v0/valid_with_warnings/valid_with_IT_riuso_codiceIPA.yml b/testdata/v0/valid_with_warnings/valid_with_IT_riuso_codiceIPA.yml
index 567b0c1..0127ffb 100644
--- a/testdata/v0/valid_with_warnings/valid_with_IT_riuso_codiceIPA.yml
+++ b/testdata/v0/valid_with_warnings/valid_with_IT_riuso_codiceIPA.yml
@@ -4,7 +4,7 @@ name: Medusa
 applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -15,10 +15,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -29,8 +25,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -58,8 +52,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos: # Demo videos of the software
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -79,15 +71,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@comune.reggioemilia.it"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
@@ -98,14 +90,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid_with_warnings/valid_with_country_specific_section_downcase.yml b/testdata/v0/valid_with_warnings/valid_with_country_specific_section_downcase.yml
index b43ea66..401deb8 100644
--- a/testdata/v0/valid_with_warnings/valid_with_country_specific_section_downcase.yml
+++ b/testdata/v0/valid_with_warnings/valid_with_country_specific_section_downcase.yml
@@ -5,7 +5,7 @@ applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 landingURL: "https://developers.italia.it"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -16,10 +16,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -30,8 +26,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -59,8 +53,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos:
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -84,14 +76,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid_with_warnings/valid_with_dependsOn_open.yml b/testdata/v0/valid_with_warnings/valid_with_dependsOn_open.yml
new file mode 100644
index 0000000..d82a530
--- /dev/null
+++ b/testdata/v0/valid_with_warnings/valid_with_dependsOn_open.yml
@@ -0,0 +1,59 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    features:
+       - Just one feature
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
+
+dependsOn:
+  open:
+    - name: MySQL
+      versionMin: "1.1"
+      versionMax: "1.3"
+      optional: true
+    - name: PostgreSQL
+      version: "3.2"
diff --git a/testdata/v0/valid_with_warnings/valid_with_government_scope.yml b/testdata/v0/valid_with_warnings/valid_with_government_scope.yml
new file mode 100644
index 0000000..2a1afac
--- /dev/null
+++ b/testdata/v0/valid_with_warnings/valid_with_government_scope.yml
@@ -0,0 +1,55 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+intendedAudience:
+  scope:
+    - science-and-technology
+    - government
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    features:
+       - Just one feature
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
diff --git a/testdata/v0/valid_with_warnings/valid_with_isBasedOn_string.yml b/testdata/v0/valid_with_warnings/valid_with_isBasedOn_string.yml
new file mode 100644
index 0000000..2bd1474
--- /dev/null
+++ b/testdata/v0/valid_with_warnings/valid_with_isBasedOn_string.yml
@@ -0,0 +1,52 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+isBasedOn: "https://github.com/italia/developers.italia.it.git"
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    features:
+       - Just one feature
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
diff --git a/testdata/v0/valid_with_warnings/valid_with_it_conforme.yml b/testdata/v0/valid_with_warnings/valid_with_it_conforme.yml
index 2edfd08..69d8d3b 100644
--- a/testdata/v0/valid_with_warnings/valid_with_it_conforme.yml
+++ b/testdata/v0/valid_with_warnings/valid_with_it_conforme.yml
@@ -4,7 +4,7 @@ name: Medusa
 applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -15,10 +15,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -29,8 +25,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -58,8 +52,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos: # Demo videos of the software
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -79,15 +71,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@comune.reggioemilia.it"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
@@ -98,14 +90,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid_with_warnings/valid_with_legal_repoOwner.yml b/testdata/v0/valid_with_warnings/valid_with_legal_repoOwner.yml
index 6dd031c..9c5d839 100644
--- a/testdata/v0/valid_with_warnings/valid_with_legal_repoOwner.yml
+++ b/testdata/v0/valid_with_warnings/valid_with_legal_repoOwner.yml
@@ -4,7 +4,7 @@ name: Medusa
 applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -15,10 +15,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -29,8 +25,6 @@ intendedAudience:
   countries:
     - IT
     - DE
-  unsupportedCountries:
-    - US
 
 description:
   en:
@@ -58,8 +52,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos:
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -81,15 +73,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@comune.reggioemilia.it"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
@@ -100,14 +92,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid_with_warnings/valid_with_lowercase_countries.yml b/testdata/v0/valid_with_warnings/valid_with_lowercase_countries.yml
index 21e9ca7..6d8f858 100644
--- a/testdata/v0/valid_with_warnings/valid_with_lowercase_countries.yml
+++ b/testdata/v0/valid_with_warnings/valid_with_lowercase_countries.yml
@@ -4,7 +4,7 @@ name: Medusa
 applicationSuite: MegaProductivitySuite
 url: "https://github.com/italia/developers.italia.it.git"
 
-isBasedOn: "https://github.com/italia/developers.italia.it.git"
+isBasedOn: ["https://github.com/italia/developers.italia.it.git"]
 softwareVersion: "1.0"
 releaseDate: 2017-04-15
 
@@ -15,10 +15,6 @@ platforms:
 categories:
   - cloud-management
 
-usedBy:
-  - Comune di Firenze
-  - Comune di Roma
-
 roadmap: "https://designers.italia.it/roadmap/"
 
 developmentStatus: development
@@ -59,8 +55,6 @@ description:
       - Will run without a problem
       - Has zero bugs
       - Solves all the problems of the world
-    videos: # Demo videos of the software
-      - https://www.youtube.com/watch?v=RaHmGbBOP84
     awards:
       - 1st Price Software of the year
 
@@ -80,15 +74,15 @@ maintenance:
     - name: Francesco Rossi
       email: "francesco.rossi@comune.reggioemilia.it"
       affiliation: Comune di Reggio Emilia
-      phone: +39 231 13215112
+      phone: +3923113215112
     - name: Dario Bianchi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
     - name: Giancarlo Verdi
       email: "dario.bianchi@fornitore.it"
       affiliation: Fornitore Privato S.P.A.
-      phone: +39 16 24231322
+      phone: +391624231322
 
 localisation:
   localisationReady: true
@@ -99,14 +93,6 @@ localisation:
     - de
 
 dependsOn:
-  open:
-    - name: MySQL
-      versionMin: "1.1"
-      versionMax: "1.3"
-      optional: true
-    - name: PostgreSQL
-      version: "3.2"
-      optional: true
   proprietary:
     - name: Oracle
       versionMin: "11.4"
diff --git a/testdata/v0/valid_with_warnings/valid_with_unsupportedCountries.yml b/testdata/v0/valid_with_warnings/valid_with_unsupportedCountries.yml
new file mode 100644
index 0000000..1573457
--- /dev/null
+++ b/testdata/v0/valid_with_warnings/valid_with_unsupportedCountries.yml
@@ -0,0 +1,56 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+intendedAudience:
+  countries:
+    - IT
+  unsupportedCountries:
+    - US
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    features:
+       - Just one feature
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
diff --git a/testdata/v0/valid_with_warnings/valid_with_usedBy.yml b/testdata/v0/valid_with_warnings/valid_with_usedBy.yml
new file mode 100644
index 0000000..115be95
--- /dev/null
+++ b/testdata/v0/valid_with_warnings/valid_with_usedBy.yml
@@ -0,0 +1,54 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+usedBy:
+  - Comune di Firenze
+  - Comune di Roma
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    features:
+       - Just one feature
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
diff --git a/testdata/v0/valid_with_warnings/valid_with_videos.yml b/testdata/v0/valid_with_warnings/valid_with_videos.yml
new file mode 100644
index 0000000..9aaae57
--- /dev/null
+++ b/testdata/v0/valid_with_warnings/valid_with_videos.yml
@@ -0,0 +1,52 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://github.com/italia/developers.italia.it.git"
+
+platforms:
+  - web
+
+categories:
+  - cloud-management
+
+developmentStatus: development
+
+softwareType: "standalone/other"
+
+description:
+  en-GB:
+    localisedName: Medusa
+    shortDescription: >
+          A rather short description which
+          is probably useless
+    longDescription: >
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 158 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 316 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 474 characters.
+          Very long description of this software, also split
+          on multiple rows. You should note what the software
+          is and why one should need it. This is 632 characters.
+    features:
+       - Just one feature
+    videos:
+      - https://www.youtube.com/watch?v=RaHmGbBOP84
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en
diff --git a/v0_test.go b/v0_test.go
index b415f20..d7e62b3 100644
--- a/v0_test.go
+++ b/v0_test.go
@@ -15,7 +15,7 @@ func TestValidTestcasesV0_NoNetwork(t *testing.T) {
 func TestValidWithWarningTestcasesV0_NoNetwork(t *testing.T) {
 	expected := map[string]error{
 		"authorsFile.yml": ValidationResults{
-			ValidationWarning{"", "legal.authorsFile", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 71, 3},
+			ValidationWarning{"", "legal.authorsFile", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 63, 3},
 		},
 	}
 
@@ -52,6 +52,9 @@ func TestInvalidTestcasesV0_NoNetwork(t *testing.T) {
 		"landingURL_invalid.yml": ValidationResults{
 			// Just a syntax check here, no check for reachability as network is disabled
 			ValidationError{"", "landingURL", "landingURL must be an HTTP URL", 8, 1},
+			ValidationWarning{"", "dependsOn.open", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 102, 3},
+			ValidationWarning{"", "usedBy", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 21, 1},
+			ValidationWarning{"", "description.en.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 62, 5},
 		},
 
 		// monochromeLogo
@@ -151,10 +154,15 @@ func TestInvalidTestcasesV0(t *testing.T) {
 		// landingURL
 		"landingURL_wrong_type.yml": ValidationResults{
 			ValidationError{"", "landingURL", "wrong type for this field", 8, 1},
+			ValidationWarning{"", "dependsOn.open", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 98, 3},
+			ValidationWarning{"", "usedBy", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 21, 1},
 		},
 		"landingURL_invalid.yml": ValidationResults{
 			ValidationError{"", "landingURL", "landingURL must be an HTTP URL", 8, 1},
 			ValidationError{"", "landingURL", "'???' not reachable: missing URL scheme", 8, 1},
+			ValidationWarning{"", "dependsOn.open", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 102, 3},
+			ValidationWarning{"", "usedBy", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 21, 1},
+			ValidationWarning{"", "description.en.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 62, 5},
 		},
 
 		// isBasedOn
@@ -165,6 +173,7 @@ func TestInvalidTestcasesV0(t *testing.T) {
 			ValidationError{"", "isBasedOn[1]", "isBasedOn[1] must be a valid URL", 11, 5},
 		},
 		"isBasedOn_bad_url_string.yml": ValidationResults{
+			ValidationWarning{"", "isBasedOn", "The single string form is DEPRECATED and will be removed in the future. Use a one element array instead", 9, 1},
 			ValidationError{"", "isBasedOn[0]", "isBasedOn[0] must be a valid URL", 9, 1},
 		},
 
@@ -347,6 +356,7 @@ func TestInvalidTestcasesV0(t *testing.T) {
 		},
 		"intendedAudience_unsupportedCountries_invalid_country.yml": ValidationResults{
 			ValidationError{"", "intendedAudience.unsupportedCountries[0]", "unsupportedCountries[0] must be a valid ISO 3166-1 alpha-2 two-letter country code", 20, 7},
+			ValidationWarning{"", "intendedAudience.unsupportedCountries", "This key is DEPRECATED and will be removed in the future. Use 'intendedAudience.countries' to list the targeted countries instead", 18, 3},
 		},
 		"intendedAudience_unsupportedCountries_wrong_type.yml": ValidationResults{
 			ValidationError{"", "intendedAudience.unsupportedCountries", "wrong type for this field", 19, 1},
@@ -423,9 +433,11 @@ func TestInvalidTestcasesV0(t *testing.T) {
 		},
 		"description_en_videos_invalid.yml": ValidationResults{
 			ValidationError{"", "description.en.videos[0]", "videos[0] must be an HTTP URL", 41, 9},
+			ValidationWarning{"", "description.en.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 39, 5},
 			ValidationError{"", "description.en.videos[0]", "'ABC' is not a valid video URL supporting oEmbed: invalid oEmbed link: ABC", 41, 9},
 		},
 		"description_en_videos_invalid_oembed.yml": ValidationResults{
+			ValidationWarning{"", "description.en.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 39, 5},
 			ValidationError{"", "description.en.videos[0]", "'https://google.com' is not a valid video URL supporting oEmbed: invalid oEmbed link: https://google.com", 41, 9},
 		},
 
@@ -549,11 +561,17 @@ func TestInvalidTestcasesV0(t *testing.T) {
 			ValidationError{"", "IT.riuso.codiceIPA", "codiceIPA must be a valid Italian Public Administration Code (iPA) (see https://github.com/publiccodeyml/italian-organizations-ipa-vocabulary)", 55, 5},
 		},
 		"it_IT_duplicated.yml": ValidationResults{
-			ValidationWarning{"", "it", "Lowercase country codes are DEPRECATED and will be removed in the future. Use 'IT' instead", 116, 1},
-			ValidationError{"", "it", "'IT' key already present. Remove this key", 116, 1},
+			ValidationWarning{"", "dependsOn.open", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 85, 3},
+			ValidationWarning{"", "usedBy", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 19, 1},
+			ValidationWarning{"", "description.en.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 60, 5},
+			ValidationWarning{"", "it", "Lowercase country codes are DEPRECATED and will be removed in the future. Use 'IT' instead", 114, 1},
+			ValidationError{"", "it", "'IT' key already present. Remove this key", 114, 1},
 		},
 		"it_wrong_case.yml": ValidationResults{
-			ValidationError{"", "It", "unknown field \"It\"", 107, 1},
+			ValidationError{"", "It", "unknown field \"It\"", 105, 1},
+			ValidationWarning{"", "dependsOn.open", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 85, 3},
+			ValidationWarning{"", "usedBy", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 19, 1},
+			ValidationWarning{"", "description.en.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 60, 5},
 		},
 		"description_en_gb_invalid_bcp47.yml": ValidationResults{
 			ValidationError{"", "description", "description must be a valid BCP 47 language", 18, 1},
@@ -614,6 +632,9 @@ func TestValidWithWarningsTestcasesV0(t *testing.T) {
 		"unicode_grapheme_clusters.yml": ValidationResults{
 			ValidationWarning{"", "description.en.genericName", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 23, 5},
 		},
+		"maintenance_contacts_phone_not_e164.yml": ValidationResults{
+			ValidationWarning{"", "maintenance.contacts[0].phone", "Phone numbers SHOULD use the E.164 format, e.g. '+3923113215112'", 46, 7},
+		},
 		"valid.minimal.v0.2.yml": ValidationResults{
 			ValidationWarning{"", "publiccodeYmlVersion", "v0.2 is not the latest version, use '0'. Parsing this file as v0.8.", 1, 1},
 		},
@@ -631,21 +652,40 @@ func TestValidWithWarningsTestcasesV0(t *testing.T) {
 			ValidationWarning{"", "outputTypes", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 50, 1},
 		},
 		"valid_with_it_conforme.yml": ValidationResults{
-			ValidationWarning{"", "IT.conforme", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 119, 3},
+			ValidationWarning{"", "IT.conforme", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 103, 3},
 		},
 		"valid_with_country_specific_section_downcase.yml": ValidationResults{
-			ValidationWarning{"", "it", "Lowercase country codes are DEPRECATED and will be removed in the future. Use 'IT' instead", 107, 1},
+			ValidationWarning{"", "it", "Lowercase country codes are DEPRECATED and will be removed in the future. Use 'IT' instead", 91, 1},
 		},
 		"valid_with_lowercase_countries.yml": ValidationResults{
-			ValidationWarning{"", "intendedAudience.countries[0]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('IT')", 31, 7},
-			ValidationWarning{"", "intendedAudience.countries[1]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('DE')", 32, 7},
-			ValidationWarning{"", "intendedAudience.unsupportedCountries[0]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('US')", 34, 7},
+			ValidationWarning{"", "intendedAudience.countries[0]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('IT')", 27, 7},
+			ValidationWarning{"", "intendedAudience.countries[1]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('DE')", 28, 7},
+			ValidationWarning{"", "intendedAudience.unsupportedCountries", "This key is DEPRECATED and will be removed in the future. Use 'intendedAudience.countries' to list the targeted countries instead", 29, 3},
+			ValidationWarning{"", "intendedAudience.unsupportedCountries[0]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('US')", 30, 7},
+		},
+		"valid_with_government_scope.yml": ValidationResults{
+			ValidationWarning{"", "intendedAudience.scope[1]", "The 'government' scope is DEPRECATED and will be removed in the future. It's safe to drop it", 19, 7},
+		},
+		"valid_with_unsupportedCountries.yml": ValidationResults{
+			ValidationWarning{"", "intendedAudience.unsupportedCountries", "This key is DEPRECATED and will be removed in the future. Use 'intendedAudience.countries' to list the targeted countries instead", 19, 3},
+		},
+		"valid_with_isBasedOn_string.yml": ValidationResults{
+			ValidationWarning{"", "isBasedOn", "The single string form is DEPRECATED and will be removed in the future. Use a one element array instead", 6, 1},
 		},
 		"valid_with_legal_repoOwner.yml": ValidationResults{
-			ValidationWarning{"", "legal.repoOwner", "This key is DEPRECATED and will be removed in the future. Use 'organisation.name' instead", 70, 3},
+			ValidationWarning{"", "legal.repoOwner", "This key is DEPRECATED and will be removed in the future. Use 'organisation.name' instead", 62, 3},
+		},
+		"valid_with_usedBy.yml": ValidationResults{
+			ValidationWarning{"", "usedBy", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 12, 1},
+		},
+		"valid_with_dependsOn_open.yml": ValidationResults{
+			ValidationWarning{"", "dependsOn.open", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 53, 3},
+		},
+		"valid_with_videos.yml": ValidationResults{
+			ValidationWarning{"", "description.en-GB.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 37, 5},
 		},
 		"valid_with_IT_riuso_codiceIPA.yml": ValidationResults{
-			ValidationWarning{"", "IT.riuso.codiceIPA", "This key is DEPRECATED and will be removed in the future. Use 'organisation.uri' and set it to 'urn:x-italian-pa:pcm' instead", 119, 5},
+			ValidationWarning{"", "IT.riuso.codiceIPA", "This key is DEPRECATED and will be removed in the future. Use 'organisation.uri' and set it to 'urn:x-italian-pa:pcm' instead", 103, 5},
 		},
 	}
 
@@ -674,9 +714,17 @@ func TestDecodeValueErrorsRemote(t *testing.T) {
 		// Pinned to a commit: fetching from main means a testdata change
 		// breaks this test in every PR until the change itself lands.
 		{"https://raw.githubusercontent.com/italia/publiccode-parser-go/389af926bcb5bcb723b56d8e390585f2d0f2c7e8/testdata/v0/valid_with_warnings/valid_with_lowercase_countries.yml", ValidationResults{
+			ValidationWarning{"", "isBasedOn", "The single string form is DEPRECATED and will be removed in the future. Use a one element array instead", 7, 1},
 			ValidationWarning{"", "intendedAudience.countries[0]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('IT')", 31, 7},
 			ValidationWarning{"", "intendedAudience.countries[1]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('DE')", 32, 7},
+			ValidationWarning{"", "intendedAudience.unsupportedCountries", "This key is DEPRECATED and will be removed in the future. Use 'intendedAudience.countries' to list the targeted countries instead", 33, 3},
 			ValidationWarning{"", "intendedAudience.unsupportedCountries[0]", "Lowercase country codes are DEPRECATED. Use uppercase instead ('US')", 34, 7},
+			ValidationWarning{"", "maintenance.contacts[0].phone", "Phone numbers SHOULD use the E.164 format, e.g. '+3923113215112'", 83, 7},
+			ValidationWarning{"", "maintenance.contacts[1].phone", "Phone numbers SHOULD use the E.164 format, e.g. '+3923113215112'", 87, 7},
+			ValidationWarning{"", "maintenance.contacts[2].phone", "Phone numbers SHOULD use the E.164 format, e.g. '+3923113215112'", 91, 7},
+			ValidationWarning{"", "dependsOn.open", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 102, 3},
+			ValidationWarning{"", "usedBy", "This key is DEPRECATED and will be removed in the future. It's safe to drop it", 18, 1},
+			ValidationWarning{"", "description.en.videos", "This key is DEPRECATED and will be removed in the future. Link videos from the documentation or the website instead", 62, 5},
 		}},
 	}
 
diff --git a/validations.go b/validations.go
index 2648863..7b085f9 100644
--- a/validations.go
+++ b/validations.go
@@ -158,7 +158,7 @@ func (p *Parser) fileExists(u url.URL, network bool) (bool, error) {
 // isImageFile check whether the string is a valid image. It also checks if the file exists.
 // It returns true if it is an image or false if it's not and an error, if any.
 func (p *Parser) isImageFile(u url.URL, network bool) (bool, error) {
-	validExt := []string{".jpg", ".png"}
+	validExt := []string{".png", ".jpg", ".jpeg", ".webp", ".avif"}
 	ext := strings.ToLower(filepath.Ext(u.Path))
 
 	if !slices.Contains(validExt, ext) {
@@ -171,7 +171,7 @@ func (p *Parser) isImageFile(u url.URL, network bool) (bool, error) {
 // validLogo returns true if the file path in value is a valid logo.
 // It also checks if the file exists.
 func (p *Parser) validLogo(u url.URL, network bool) (bool, error) {
-	validExt := []string{".svg", ".svgz", ".png"}
+	validExt := []string{".svg", ".svgz", ".png", ".jpg", ".jpeg", ".webp", ".avif"}
 	ext := strings.ToLower(filepath.Ext(u.Path))
 
 	// Check for valid extension.