fix(PostalAddress): Add schema: prefix; add checks for this

schema/PostalAddress.schema.yaml

@@ -7,26 +7,26 @@ category: metadata
 description: A physical mailing address.
 properties:
   streetAddress:
-    '@id': streetAddress
+    '@id': schema:streetAddress
     description: The street address.
     $comment: For example, 10 Downing Street.
     type: string
   postOfficeBoxNumber:
-    '@id': postOfficeBoxNumber
+    '@id': schema:postOfficeBoxNumber
     description: The post office box number.
     type: string
   addressLocality:
-    '@id': addressLocality
+    '@id': schema:addressLocality
     description: The locality in which the street address is, and which is in the region.
     $comment: For example, London.
     type: string
   addressRegion:
-    '@id': addressRegion
+    '@id': schema:addressRegion
     description: The region in which the locality is, and which is in the country.
     $comment: For example, California or another appropriate first-level Administrative division
     type: string
   postalCode:
-    '@id': postalCode
+    '@id': schema:postalCode
     description: The postal code.
     $comment: For example, 94043.
     type: string

ts/schema.ts

@@ -179,6 +179,8 @@ const checkSchema = (
     const id = schema['@id']
     if (id === undefined) error(`${title} is missing @id`)
     else {
+      if (!/^[a-z]+:/.test(id))
+        error(`@id "${id}" is not prefixed witha vocabulary e.g. "schema:"`)
       if (allIds[id] !== undefined && allIds[id] !== title)
         error(
           `@id "${id}" is associated with more than one name "${allIds[id]}", "${title}"`
@@ -196,6 +198,8 @@ const checkSchema = (
       const id = property['@id']
       if (id === undefined) error(`${title}.${name} is missing @id`)
       else {
+        if (!/^[a-z]+:/.test(id))
+          error(`@id "${id}" is not prefixed witha vocabulary e.g. "schema:"`)
         if (allIds[id] !== undefined && allIds[id] !== name)
           error(
             `@id "${id}" is associated with more than one name "${allIds[id]}", "${name}"`