Re: All teidata.pointer attributes

Thanks Conal. I don't have any climactic excuse, but I realised just 
after my posting last night that this approach is only going to show the 
attributes which are directly declared in an element spec. But in fact 
most pointer-valued attributes get that way by being inherited from an 
attribute class. So something rather more complex is needed:  you need 
to look for elements which have a memberOf child that names an attribute 
class which supplies an pointer-valued attribute ... or which inherits 
from another class which does. Writing the xslt to do that is left as an 
exercise for the reader, since it's Sunday and I am cooking.


On 05/02/17 09:11, Conal Tuohy wrote:
> Whoops I made a mistake in that message (I blame the Brisbane summer heat!)
>
> The code I had inside the templates was wrong:
>
>     <!-- wrong! -->
>     <xsl:copy>
>        <xsl:attribute name="haspointer">true</xsl:attribute>
>        <xsl:copy-of select="@* | node()"/>
>     </xsl:copy>
>
> It should of course have applied templates to the children of the matched
> elements:
>
>     <xsl:copy>
>        <xsl:attribute name="haspointer">true</xsl:attribute>
>        <xsl:copy-of select="@*">
>        <xsl:apply-templates/>
>     </xsl:copy>
>
> [turning the fan on now]
>
> On 5 February 2017 at 19:07, Conal Tuohy <[email protected]> wrote:
>
>> Borrowing Lou's suggested XPath, let me suggest a couple of ways to deploy
>> it in XSLT:
>>
>> If you are using XSLT 2.0 (or later), then you can record the list of
>> "pointer" elements' names in a global variable, and then define a template
>> which matches elements whose names appear in that list.
>>
>> <xsl:variable name="pointer-element-names" select="
>>     document('http://www.tei-c.org/release/xml/tei/odd/p5subset.xml')
>>        //t:elementSpec[t:attList/t:attDef/t:datatype/t:dataRef/@
>> key='teidata.pointer']
>>        /@ident
>> "/>
>>
>> <xsl:template match="*[local-name() = $pointer-element-names]">
>>     <!-- process the pointer element -->
>>     <xsl:copy>
>>        <xsl:attribute name="haspointer">true</xsl:attribute>
>>        <xsl:copy-of select="@* | node()"/>
>>     </xsl:copy>
>> </xsl:template>
>>
>> That's likely to be the most efficient approach, because the "//" step is
>> expensive (traversing the entire ODD document), and storing the result in a
>> variable means you only perform this traversal once.
>>
>> You can't do this in XSLT 1, though, because references to variables are
>> not allowed in template match expressions. You could, however, do something
>> like this:
>>
>> <xsl:template match="*">
>>     <xsl:copy>
>>        <xsl:if test="local-name() = $pointer-element-names">
>>           <xsl:attribute name="haspointer">true</xsl:attribute>
>>        </xsl:if>
>>        <xsl:copy-of select="@* | node()"/>
>>     </xsl:copy>
>> </xsl:template>
>>
>> Also in XSLT 1 you should be able to do without a variable, by including
>> the "document()" function call in the match expression, but performance
>> might not be very good (because of the "//" step, and also because some
>> older XSLT processors might not cache the result of the "document()"
>> function call).
>>
>> <xsl:template match="
>>     *[
>>        local-name()=document('http://www.tei-c.org/release/xml/tei/
>> odd/p5subset.xml')
>>           //t:elementSpec[t:attList/t:attDef/t:datatype/t:dataRef/@
>> key='teidata.pointer']
>>           /@ident
>>     ]
>> ">
>>     <xsl:copy>
>>        <xsl:attribute name="haspointer">true</xsl:attribute>
>>        <xsl:copy-of select="@* | node()"/>
>>     </xsl:copy>
>> </xsl:template>
>>
>>
>> On 5 February 2017 at 09:17, Lou Burnard <[email protected]>
>> wrote:
>>
>>> This information is not available from the document instance: you need to
>>> look at the ODD from which the schema that validates the document instances
>>> was generated.
>>>
>>> If you're using a document that is valid against TEI all, this will list
>>> all the elements concerned:
>>>
>>> <xsl:template xmlns:t="http://www.tei-c.org/ns/1.0"
>>> <http://www.tei-c.org/ns/1.0> match="/">
>>>     <xsl:for-each select="document('http://www.*tei*-c.org/release/*xml*/
>>> *tei*/odd/*p5subset*.*xml*l')//t:elementSpec[
>>> t:attList/t:attDef/t:datatype/t:dataRef/@key='teidata.pointer']">
>>>         <xsl:message><xsl:value-of select='@ident'/></xsl:message>
>>>     </xsl:for-each>
>>>
>>>
>>> On 04/02/17 22:52, John P. McCaskey wrote:
>>>
>>> Running an XSL transform against a TEI document, I want to match all TEI
>>> elements that contain at least one teidata.pointer attribute.
>>>
>>> I can’t match just on attribute name. In some elements @value is a
>>> pointer, in others it’s text. Sometimes @class is a pointer, sometimes not.
>>>
>>> Is there a master list of attributes that can be pointers and the
>>> elements in which they are?
>>>
>>> (Even better if the list is in a form that makes it easy to use in an XSL
>>> match. Double extra better if you can show me the very XSLT that will copy
>>> the element and add an attribute “haspointer=’true’”!)
>>>
>>> Thanks!
>>> John
>>>
>>>
>>>
>>
>> --
>> Conal Tuohy
>> http://conaltuohy.com/
>> @conal_tuohy
>> +61-466-324297 <0466%20324%20297>
>>
>
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