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Hi all,

The thread relating to supporting a more full RDF API doesn't seem to
have reached any consensus, but I haven't seen any objection to the
proposal to move the functions to fetch RDF/XML from element to model,
and making them return RDF documents equivalent to all the RDF in the model.

I propose that the following changes are made to the CellML_APISPEC
interface definition:

1) "RDFRepresentation getRDFRepresentation(in wstring type)
raises(CellMLException);" is removed from interface Element.

2) The following is added to the end of interface Model:

/**
* The RDF metadata associated with this element.
* @param type The URN describing the type of RDF metadata.
Implementations
* are free to add new types by creating new type names
at URNs
* under their jurisdiction. New URNs under
http://www.cellml.org
* are reserved for future versions of this specification.
* @return The object containing the RDF representation. The object may
* be cast in an application defined manner depending on the
type
* returned.
* @raises CellMLException if type isn't supported.
* All implementations must implement the following types:
* http://www.cellml.org/RDFXML/string
* http://www.cellml.org/RDFXML/DOM
*/
RDFRepresentation getRDFRepresentation(in wstring type)
raises(CellMLException);

3) The RDFXMLDOMRepresentation and RDFXMLStringRepresentation interfaces
are removed, and replaced with:
/**
* The RDF representation for type="http://www.cellml.org/RDFXML/DOM";
*/
interface RDFXMLDOMRepresentation : RDFRepresentation
{
/**
* A complete RDF/XML document (including a single top-level RDF:rdf
* element) as a DOM document. The document fetched is a copy of the RDF
* in the model (that is, it is not live). However, fetching the
attribute
* again will update to the latest data. Assigning this attribute to
* a new document (or a changed version of the previous document) will
* replace all the RDF in the model with the contents of the new
document.
*/
attribute dom::Document data;
};

/**
* The RDF representation for type="http://www.cellml.org/RDFXML/string";
*/
interface RDFXMLStringRepresentation : RDFRepresentation
{
/**
* A complete RDF/XML document (including a single top-level RDF:rdf
* element) as a serialised string. The document fetched is a copy
of the RDF
* in the model (that is, it is not live). However, fetching the
attribute
* again will update to the latest data. Assigning this attribute to
* a new document (or a changed version of the previous document) will
* replace all the RDF in the model with the contents of the new
document.
*/
attribute wstring serialisedData;
};

Please let me know (via cellml-discussion at cellml.org) if you have any
objections or comments about the above changes. I would be particularly
interested to know if anyone is currently using getRDFRepresentation on
Element (in which case these changes will introduce an incompatibility).

Best regards,
Andrew

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• [cellml-discussion] CellML API: RDF to model, Andrew Miller, 09/15/2006
  • [cellml-discussion] CellML API: RDF to model, David Nickerson, 09/15/2006

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