feat: Add plural variants for DC fields and deprecate singular

src/feeds/atom/generate/index.test.ts

@@ -576,7 +576,7 @@ describe('generate', () => {
       updated: new Date('2023-03-15T12:00:00Z'),
       dc: {
         creator: 'John Doe',
-        rights: 'Copyright 2023',
+        rights: ['Copyright 2023'],
       },
       sy: {
         updatePeriod: 'daily',

src/feeds/atom/generate/utils.test.ts

@@ -1005,7 +1005,7 @@ describe('generateFeed', () => {
       updated: new Date('2023-03-15T12:00:00Z'),
       dc: {
         creator: 'Jane Smith',
-        rights: 'Copyright 2023',
+        rights: ['Copyright 2023'],
       },
     }
     const expected = {
@@ -1016,7 +1016,7 @@ describe('generateFeed', () => {
         title: 'Feed with namespaces',
         updated: '2023-03-15T12:00:00.000Z',
         'dc:creator': 'Jane Smith',
-        'dc:rights': 'Copyright 2023',
+        'dc:rights': ['Copyright 2023'],
       },
     }
 

src/feeds/atom/parse/index.test.ts

@@ -393,6 +393,7 @@ describe('parse', () => {
             updated: '2024-01-01T00:00:00Z',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
             },
           },
         ],
@@ -433,7 +434,9 @@ describe('parse', () => {
             updated: '2024-01-01T00:00:00Z',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
               date: '2023-01-01',
+              dates: ['2023-01-01'],
             },
           },
           {
@@ -473,6 +476,7 @@ describe('parse', () => {
             updated: '2024-01-01T00:00:00Z',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
             },
           },
         ],
@@ -565,7 +569,9 @@ describe('parse', () => {
             updated: '2024-01-01T00:00:00Z',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
               date: '2023-01-01',
+              dates: ['2023-01-01'],
             },
             media: {
               title: { value: 'Media Title' },
@@ -615,6 +621,7 @@ describe('parse', () => {
             updated: '2024-01-01T00:00:00Z',
             dc: {
               creator: 'Should not normalize (empty URI)',
+              creators: ['Should not normalize (empty URI)'],
             },
           },
         ],
@@ -668,6 +675,7 @@ describe('parse', () => {
             title: 'Incomplete Entry',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
             },
           },
         ],
@@ -737,6 +745,7 @@ describe('parse', () => {
               updated: '2024-01-01T00:00:00Z',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -771,6 +780,7 @@ describe('parse', () => {
               updated: '2024-01-01T00:00:00Z',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -805,6 +815,7 @@ describe('parse', () => {
               updated: '2024-01-01T00:00:00Z',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -839,6 +850,7 @@ describe('parse', () => {
               updated: '2024-01-01T00:00:00Z',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -873,6 +885,7 @@ describe('parse', () => {
               updated: '2024-01-01T00:00:00Z',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -907,6 +920,7 @@ describe('parse', () => {
               updated: '2024-01-01T00:00:00Z',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],

src/feeds/atom/parse/utils.test.ts

@@ -992,7 +992,10 @@ describe('parseEntry', () => {
     const expected = {
       id: 'urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a',
       title: 'Example Entry',
-      dc: { creator: 'John Doe' },
+      dc: {
+        creator: 'John Doe',
+        creators: ['John Doe'],
+      },
     }
 
     expect(parseEntry(value)).toEqual(expected)
@@ -1493,7 +1496,10 @@ describe('parseFeed', () => {
     const expected = {
       id: 'urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a',
       title: 'Example Feed',
-      dc: { creator: 'John Doe' },
+      dc: {
+        creator: 'John Doe',
+        creators: ['John Doe'],
+      },
     }
 
     expect(parseFeed(value)).toEqual(expected)

src/feeds/atom/references/atom-ns.json

@@ -6,21 +6,35 @@
       "id": "example-entry",
       "title": "Example Entry",
       "dc": {
-        "creator": "Jack Jackson",
-        "contributor": "Assistant Editor Mike Thompson",
-        "date": "2022-01-01T12:00:00.000Z",
-        "description": "Detailed description of the example entry content",
+        "titles": ["Dublin Core Enhanced Entry Title"],
+        "creators": ["Jack Jackson"],
+        "subjects": ["Article, Tutorial, Example"],
+        "descriptions": ["Detailed description of the example entry content"],
+        "publishers": ["Example News Organization"],
+        "contributors": ["Assistant Editor Mike Thompson"],
+        "dates": ["2022-01-01T12:00:00.000Z"],
+        "types": ["Article"],
+        "formats": ["application/xhtml+xml"],
+        "identifiers": ["urn:uuid:98765432-9876-9876-9876-987654321def"],
+        "sources": ["https://example.org/entry-source"],
+        "languages": ["en-US"],
+        "relations": ["https://example.org/related-entry"],
+        "coverages": ["United States"],
+        "rights": ["Copyright 2025 Example News Organization"],
         "title": "Dublin Core Enhanced Entry Title",
+        "creator": "Jack Jackson",
         "subject": "Article, Tutorial, Example",
+        "description": "Detailed description of the example entry content",
         "publisher": "Example News Organization",
+        "contributor": "Assistant Editor Mike Thompson",
+        "date": "2022-01-01T12:00:00.000Z",
         "type": "Article",
         "format": "application/xhtml+xml",
         "identifier": "urn:uuid:98765432-9876-9876-9876-987654321def",
         "source": "https://example.org/entry-source",
         "language": "en-US",
         "relation": "https://example.org/related-entry",
-        "coverage": "United States",
-        "rights": "Copyright 2025 Example News Organization"
+        "coverage": "United States"
       },
       "dcterms": {
         "created": "2022-01-01T12:00:00.000Z",
@@ -695,21 +709,35 @@
     }
   ],
   "dc": {
-    "creator": "John Doe",
-    "contributor": "Jane Smith",
-    "date": "2022-01-01T12:00:00.000Z",
-    "description": "This is an example of description.",
+    "titles": ["Dublin Core Enhanced Feed Title"],
+    "creators": ["John Doe"],
+    "subjects": ["Technology, Programming, Web Development"],
+    "descriptions": ["This is an example of description."],
+    "publishers": ["Example Publishing Company"],
+    "contributors": ["Jane Smith"],
+    "dates": ["2022-01-01T12:00:00.000Z"],
+    "types": ["Text"],
+    "formats": ["application/atom+xml"],
+    "identifiers": ["urn:uuid:12345678-1234-1234-1234-123456789abc"],
+    "sources": ["https://example.org/original-source"],
+    "languages": ["en-US"],
+    "relations": ["https://example.org/related-content"],
+    "coverages": ["Global"],
+    "rights": ["Copyright 2025 Example Publishing Company"],
     "title": "Dublin Core Enhanced Feed Title",
+    "creator": "John Doe",
     "subject": "Technology, Programming, Web Development",
+    "description": "This is an example of description.",
     "publisher": "Example Publishing Company",
+    "contributor": "Jane Smith",
+    "date": "2022-01-01T12:00:00.000Z",
     "type": "Text",
     "format": "application/atom+xml",
     "identifier": "urn:uuid:12345678-1234-1234-1234-123456789abc",
     "source": "https://example.org/original-source",
     "language": "en-US",
     "relation": "https://example.org/related-content",
-    "coverage": "Global",
-    "rights": "Copyright 2025 Example Publishing Company"
+    "coverage": "Global"
   },
   "dcterms": {
     "created": "2022-01-01T12:00:00.000Z",

src/feeds/rdf/parse/index.test.ts

@@ -278,6 +278,7 @@ describe('parse', () => {
             description: 'Item Description',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
             },
           },
         ],
@@ -320,7 +321,9 @@ describe('parse', () => {
             description: 'Item Description',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
               date: '2023-01-01',
+              dates: ['2023-01-01'],
             },
           },
           {
@@ -362,6 +365,7 @@ describe('parse', () => {
             description: 'Item Description',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
             },
           },
         ],
@@ -453,6 +457,7 @@ describe('parse', () => {
         description: 'RDF Feed Description',
         dc: {
           creator: 'Feed Author',
+          creators: ['Feed Author'],
         },
         sy: {
           updatePeriod: 'hourly',
@@ -464,7 +469,9 @@ describe('parse', () => {
             description: 'Item Description',
             dc: {
               creator: 'John Doe',
+              creators: ['John Doe'],
               date: '2023-01-01',
+              dates: ['2023-01-01'],
             },
             slash: {
               comments: 42,
@@ -506,6 +513,7 @@ describe('parse', () => {
             title: 'Item Title',
             dc: {
               creator: 'Should not normalize (empty URI)',
+              creators: ['Should not normalize (empty URI)'],
             },
           },
         ],
@@ -565,12 +573,14 @@ describe('parse', () => {
       const expected = {
         dc: {
           creator: 'Channel Author',
+          creators: ['Channel Author'],
         },
         items: [
           {
             title: 'Item without about',
             dc: {
               creator: 'Item Author',
+              creators: ['Item Author'],
             },
           },
         ],
@@ -642,6 +652,7 @@ describe('parse', () => {
               title: 'Item',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -678,6 +689,7 @@ describe('parse', () => {
               title: 'Item',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -714,6 +726,7 @@ describe('parse', () => {
               title: 'Item',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -750,6 +763,7 @@ describe('parse', () => {
               title: 'Item',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -786,6 +800,7 @@ describe('parse', () => {
               title: 'Item',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],
@@ -822,6 +837,7 @@ describe('parse', () => {
               title: 'Item',
               dc: {
                 creator: 'John',
+                creators: ['John'],
               },
             },
           ],

src/feeds/rdf/parse/utils.test.ts

@@ -411,7 +411,10 @@ describe('parseItem', () => {
     const expected = {
       title: 'Example Entry',
       link: 'http://example.com',
-      dc: { creator: 'John Doe' },
+      dc: {
+        creator: 'John Doe',
+        creators: ['John Doe'],
+      },
     }
 
     expect(parseItem(value)).toEqual(expected)
@@ -960,7 +963,10 @@ describe('parseFeed', () => {
           link: 'https://example.com/item1',
         },
       ],
-      dc: { creator: 'John Doe' },
+      dc: {
+        creator: 'John Doe',
+        creators: ['John Doe'],
+      },
     }
 
     expect(parseFeed(value)).toEqual(expected)