Son of Dublin Core (SoDC) consists of two main components. The first component, SoDC-XML, is a concrete XML syntax for encoding graph-based (meta)data -- data that describes things which are related to other things. SoDC-XML is designed to allow graph-based (meta)data to be embedded in harvesting protocols such as OAI-PMH, and to make automatic quality control via simple syntactic validation really easy. The second component, SoDC-CL, is a language for expressing application-specific syntax constraints over a (meta)data graph, to enable automatic validation of (meta)data against an "application profile". SoDC also includes two supporting utilities. SchemaGen is a tool for automatically generating validation schemas from SoDC-CL documents. TurtleGen is a tool for translating SoDC-XML documents into the Turtle RDF syntax.
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