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Re: Annotations in XPath-NG? (Re: XPath/XSLT 2.0 con

• To: keith@w...
• Subject: Re: Annotations in XPath-NG? (Re: XPath/XSLT 2.0 concerns)
• From: Uche Ogbuji <uche.ogbuji@f...>
• Date: Sun, 13 Oct 2002 13:37:20 -0600
• Cc: uche.ogbuji@f..., xml-dev@l...
• In-reply-to: Message from "Keith W. Boone" <keith@w...> of "Tue, 08 Oct 2002 17:36:46 EDT." <LEEOLHFCOBHIBMPBAGGCMEPEELAA.keith@w...>
• Sender: uche.ogbuji@f...

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> 
> Our annotation nodes are elements in a separate document or documents.
> These have an href attribute that points to what is being annotated.
> 
> The HREF uses a restricted XPointer syntax:
> 	URL#xpath(LocationPath)
> Where xpath() is a simplified XPointer scheme that supports just XPath
> LocationPath expressions.
> 
> Our annotations are very nearly [and designed that way] simple XLinks.
> 
> My real issue about context is the selection of documents [linkbases] to use
> when searching for third-party links.  If I have a given document, and can
> get to its linkbases [by getting some metadata stored with the document],
> then I can find the annotations that I want.
> 
> I'm thinking of just standardizing on XLink in general for annotations.
> Then, I can somewhere declare the roles [and arcroles] that I want to
> reverse index [possibly collection level metadata].  So then, if I add a
> document to a collection, and that document contains links with the given
> roles, I would locate the nodes referred to in the @xlink:href of the
> element to find the nodes, and reverse index them.  If the links fail to
> execute, then I fail to add it to the collection, and report an error back
> to the caller.  Importing a link element should also trigger indexing on the
> element and its attributes, in this system, since the identification of a
> link in a document implies that there is a high likely hood of its
> attributes being needed [at least in the system I'm working on].

It seems to me you have very particular needs that I think would be better 
solved in a separate layer such as XLinks or RDF rather than direct infoset 
augmentations.


-- 
Uche Ogbuji                                    Fourthought, Inc.
http://uche.ogbuji.net    http://4Suite.org    http://fourthought.com
Python&XML column: 2. Introducing PyXML - http://www.xml.com/pub/a/2002/09/25/p
y.html
The Past, Present and Future of Web Services 1 - http://www.webservices.org/ind
ex.php/article/articleview/663/1/24/
The Past, Present and Future of Web Services 2 - 'http://www.webservices.org/in
dex.php/article/articleview/679/1/24/
Serenity through markup - http://adtmag.com/article.asp?id=6807
Tip: Using generators for XML processing - http://www-106.ibm.com/developerwork
s/xml/library/x-tipgenr.html

• References:
  • RE: Annotations in XPath-NG? (Re: XPath/XSLT 2.0 concerns)
    • From: "Keith W. Boone" <keith@w...>

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