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Subject: Re: [office-metadata] Metadata only for Content


I added new rule to 
<http://wiki.oasis-open.org/office/Metadata_Object_Criteria> which 
determine the criteria for ODF nodes, where metadata might be related to.

We already have started to following list of definitions:

   1. For now the "Documents Objects" will be a subset of ODF v1.1. 
Taken from the latest OpenDocument v1.1 Relax-NG Schema (extracted from 
chapter 1 to 16 of the specification).
   2. The "Documents Objects" are solely ODF XML elements. No attributes 
have to be referred. The reason is that attributes are always closely 
connected to their element and no multiple attributes with the same name 
may exist in XML. Therefore if metadata should refer to the attribute, 
they might as well refer to the parent element.
   3. No XML elements describing Styles or metadata will be part of this 
subset
          * Styles are the formatting of Content and therefore have a 
relation in ODF to Content. metadata as well will have a relation in ODF 
to Content. But only as metadata and Styles often correlate, does not 
mean they have a direct semantic relation. They only have an indirect 
relation over the same content they are referring to. (There might be 
the idea of adding an attribute to a style to express it's consistent 
relation to a certain metadata, but this won't need the same generic 
mechanism to relate multiple metadata to content and is therefore 
neglected. Moreover it is redundant information).
          * Metadata about metadata might be a written as a new instance 
of metadata and can therefore be neglected as well.
   4. A "Document Object" is either the Document itself or needs to have 
'user data' as descendent (XPath axes). User data can be any text or 
binary data the user added to the document aside of styles and metadata.

Aside of these rules - which might be used to generate us a set of ODF 
nodes from the RelaxNG grammar - there exist a further subset, which can 
not be determined as easily.

    * Metadata might as well be attached to ODF nodes, which for 
themselves do not contain user data, but reference to an area of meta 
data, e.g. table:table-column. A general hint would be the existence of 
the style attribute.


PS: The detailed set of ODF elements is not important now and will most 
likely be added in January 2007.

Best regards,
Svante



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