Re: [xsl] Keys with different parents, but same name

[Ganesh Sindigi <ganeshaks@xxxxxxxxx>]

Wendell

Thanks for pointing me in right direction.  This
indeed worked.  But did not solved the problem :-(. 
The reason for using different keys is there could be
different types of groups and styling/rendering would
change accordingly.  For brevity, i had mentioned only
field and fieldGroup.  May be to resolve this I think
will have to look into design stuff.
And another doubt is regarding the way of changing the
context node to fieldHeaders document, if we use
<xsl:for-each ...> wont this reduce the performance? 
I might be wrong here.  
<xsl:variable name="keyvalue"
select="concat(@id,'-')"/>
<xsl:for-each select="$fieldHeaders">
   <xsl:value-of select="key('label-by-field',
$keyvalue)"/>
</xsl:for-each>

Thanks,
Ganesh.

--- Wendell Piez <wapiez@xxxxxxxxxxxxxxxx> wrote:
> Hi Ganesh,
> 
> At 04:24 PM 10/24/2003, you wrote:
> >I'm a bit stuck in usage of XSLT lookup tables
> using
> >xsl:key.
> >I'm sure someone on the list can help me or direct
> me
> >in the right direction.
> 
> I've looked at your code, though I haven't banged on
> it hard enough to know 
> everything it's doing, and see a few problems with
> it.
> 
> Rather than try to sort them out, however, I think
> just pointing you in the 
> right direction, as you requested, should suffice.
> 
> Rather than use two different keys, one that
> retrieves fields by @id, the 
> other that retrieves fieldGroups by @id, I'd use a
> single key. Construct it 
> like this:
> 
> <xsl:key name="label-by-field" match="label" 
> use="concat(ancestor::fieldgroup/@id, '-',
> parent::field/@id)"/>
> 
> Notice this is a compound key. It retrieves a
> <label> element (I'm going 
> straight for the label), using the concatenation of
> its grandparent or 
> parent fieldgroup's @id (if it doesn't have one,
> this will be '') and its 
> parent field's @id (again this will be '' if there
> is no parent field).
> 
> So you will have key values such as
>     '-customerId' (the label retrieved has value
> "Customer Id : ")
>     'homeAddress-' (the label is "House Address")
>     'homeAddress-street' (the label retrieved is
> "Street").
> 
> Then, when processing a fieldGroup, you can retrieve
> its label simply by doing:
> 
> <xsl:variable name="keyvalue"
> select="concat(@id,'-')"/>
> <xsl:for-each select="$fieldHeaders">
>    <xsl:value-of select="key('label-by-field',
> $keyvalue)"/>
> </xsl:for-each>
> 
> ...and when processing a field, you can get its
> label likewise:
> 
> <xsl:variable name="keyvalue"
>    
> select="concat(ancestor::fieldGroup/@id,'-',@id)"/>
> <xsl:for-each select="$fieldHeaders">
>    <xsl:value-of select="key('label-by-field',
> $keyvalue)"/>
> </xsl:for-each>
> 
> Notice both times you have first to bind your key
> value to a variable, then 
> change your context node to the fieldHeaders
> document so you can retrieve 
> your labels from there.
> 
> Note: untested. But I hope the concept is clear.
> Also I'm assuming that you 
> have only one layer of fieldGroup wrapping your
> fields.
> 
> Cheers,
> Wendell
> 
> >I have created a stylesheet which would render the
> xml
> >document by picking up the
> >labels for the fields from a separate document. 
> The
> >'field' is used as key.
> >These 'field' elements could be contained within
> group
> >so they are repeatable e.g. field@id = city, but
> label
> >for them would be different
> >depending upon the group they are in like in this
> case
> >for home address it is called City and for company
> >address its Location.
> >
> >The problem i am facing is I am always getting the
> >first 'field' element.  The way i have done could
> be
> >wrong.
> >
> >I tried looking into all the archives, but could
> not
> >find anything related to this.
> >
> >How do I get the label related to field element wrt
> >its parent.  Any Help would be greatly appreciated.
> >
> >Thanks,
> >Ganesh.
> >
> >Here is my styleSheet:
> >
> ><?xml version="1.0" encoding="UTF-8"?>
> ><xsl:stylesheet version="1.0"
> >xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> >    <xsl:output indent="yes" method="html"/>
> >
> >    <xsl:key name="field-lookup" match="field"
> >use="@id"/>
> >
> >    <xsl:key name="fieldGroup-lookup"
> >match="fieldGroup" use="@id"/>
> >
> >    <xsl:variable name="fieldHeaders"
> >select="document('Headers.xml')/fieldHeaders"/>
> >
> >
> >    <xsl:template match="/">
> >       <html>
> >          <style type="text/css">
> >             body {color:black; background-color:
> >white}
> >          </style>
> >          <body>
> >             <table border="1">
> >                <xsl:apply-templates/>
> >             </table>
> >          </body>
> >       </html>
> >    </xsl:template>
> >
> >    <xsl:template match="customer">
> >       <br />
> >        <table border="1"> <xsl:apply-templates />
> ></table>
> >    </xsl:template>
> >    <xsl:template match="fieldGroup">
> >       <TR>
> >          <TD colspan="2" bgcolor="CCAA00"
>
>style="font-family:verdana;font-size:80%;color:white">
> >             <xsl:apply-templates
> >select="$fieldHeaders">
> >                <xsl:with-param name="curr-label"
> >select="."/>
> >             </xsl:apply-templates>
> >          </TD>
> >       </TR>
> >       <xsl:apply-templates/>
> >    </xsl:template>
> >
> >    <xsl:template match="fieldList">
> >       <xsl:apply-templates select="field"/>
> >    </xsl:template>
> >
> >    <xsl:template match="field">
> >       <TR>
> >          <TD bgcolor="00AACC"
>
>style="font-family:verdana;font-size:80%;color:white">
> >             <xsl:apply-templates
> >select="$fieldHeaders">
> >                <xsl:with-param name="curr-label"
> >select="."/>
> >             </xsl:apply-templates>
> >          </TD>
> >          <TD>
> >             <xsl:value-of select="text()"/>
> >          </TD>
> >       </TR>
> >    </xsl:template>
> >
> >    <xsl:template match="fieldHeaders">
> >       <xsl:param name="curr-label"/>
> >       <xsl:variable name="switch"
> >select="name($curr-label/.)"/>
> >       <xsl:variable name="parent"
> >select="name($curr-label/..)"/>
> >       <xsl:value-of select="key(concat($switch,
> >'-lookup'), $curr-label/@id)/label"/>
> >    </xsl:template>
> >
> ></xsl:stylesheet>
> >
> >Here is XML document:
> >
> ><?xml version="1.0" encoding="UTF-8"?>
> ><?xml-stylesheet type="text/xsl"
> href="format.xsl"?>
> ><customerList>
> >    <customer>
> >       <field id="customerId">cust1</field>
> 
=== message truncated ===


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