Dublin Core
A minimal 15-element metadata vocabulary for describing any resource — often reused as XMP schema.
Dublin Core is a metadata standard created by librarians and information scientists in 1995. It defines 15 core metadata elements applicable to any resource — a document, image, website, dataset, or museum artifact. The vocabulary is intentionally minimal and language-agnostic, designed to be understood by both machines and humans.
The 15 elements
Creator, Date, Description, Format, Identifier, Language, Publisher, Rights, Source, Subject, Title, Type, plus optional elements Contributor, Coverage, and Relation. These fields answer the basic questions: who made it, when, what is it, what language is it in, who published it, and where can I find more information. Dublin Core is so simple and universal that it appears in digital libraries, archives, content management systems, and — increasingly — in XMP metadata embedded in files.
Why it shows up in XMP
Dublin Core is a common default in XMP toolchains. When you read metadata from a PDF or image in tools like Adobe Lightroom or the command-line ExifTool, you may see properties like dc:creator, dc:title, and dc:description. These are Dublin Core fields serialized in XMP. Every XMP-aware tool supports them.
LLMind relationship
LLMind may populate Dublin Core fields when available — for instance, extracting dc:creator from camera EXIF author data or inferring dc:description from AI analysis. But the core AI semantics — extracted entities, document structure, transcription, lineage — live in the LRFS namespace, not in Dublin Core.