[daisy] Accessing a document's fields / reading the whole XML tree

[Karel Vervaeke]


> On Thu, 2008-05-22 at 16:35 +0100, A Rocha Webmaster wrote:
> Hello all,
> 
> = First question =
> 
> I am trying to access a field. I've added a Description text field to
> the Attachment document; and now I want the Attachment HTML page to show
> that value in a meta name="description" field.
> <cut/>

Normally you can't access document fields in layout.xsl.

There is a workaround that lets you get access to the fields of the root
document (by which I mean the document whose ID is in the url), but not
to fields of included documents etc.

Steps to do this should be:
1. make sure the document is published as an annotatedDocument in the
publisher request
2. in documentlayout.xsl, add some additional xml elements where you
include the fields using xsl:copy-of (I don't know the incoming format
by heart, use <xsl:copy-of select="/"/> to find out).
3. in layout.xsl, pick up the fields by selecting the elements you added
earlier.

Note: I have never done this myself; I hope people will correct me if I
did not explain it right.

> = Second question =
> 
> Is there a URI for the input contract? I want to be able to read the
> output of the whole XML document given a doc ID, *before* any XLST
> transformations. That would really help with the Daisy learning curve.
> If there isn't a URI, can I fetch the XML in any way? I tried
> 
> <xsl:comment><xsl:copy-of select="."/></xsl:comment>

There is no such URI;  A simple solution would be to add a
teeTransformer to the html-DocumentPipe in sitemap.xmap
This would allow you to write the contents of the layout.xsl input to a
file before it is actually transformed.

notes:
 - This assumes you have minimal working knowledge of Cocoon
 - Google for cocoon + teeTransformer for more info
 - don't forget to remove the teeTransformer afterwards if you are
moving to production.

HTH,
Karel


> 
> but no luck.
> 
> More help, please?
> 
> Júlio.
> 
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