Re: [xsl] Stuck on Name() and variable

[Joerg Heinicke <joerg dot heinicke at gmx dot de>]

After a quick look on your code, I would suggest, that the error is in 
this line:

<xsl:value-of select="MapMD/attribute::*[name() = $AttrName]" />

The context node is (from the for-each) an attribute of //Map[@schema], 
so you are searching for //Map[@schema]/attribute::*[position() &gt; 
2]/MapMD/attribute::*[name() = $AttrName]. But an attribute can never 
have an element as child node.

Maybe in front of the for-each you have to store MapMD in a variable:
(I don't know what's the current context.)

<xsl:variable name="MapMD" select="MapMD"/>

and refer to it in the for-each:

<xsl:value-of select="$MapMD/attribute::*[name() = $AttrName]" />

Some more comments on your code (even it would be interesting to know 
the context of this code):

> <xsl:attribute name="data">
>   <xsl:variable name="Market" select="node()"/>
Are you sure you want to store all child nodes of the current context 
node in this variable?

>   <xsl:variable name="Key" select="parent::node()"/>
If you can answer the last question with 'yes', then you can shorten 
this code to <xsl:variable name="Key" select="."/>

>   <xsl:for-each select="//Map[@schema]/attribute::*[position() &gt; 2]" >
I think it's very dangerous to rely on position() when using on 
attribute::*. There is no order of attributes, maybe you should exclude 
some attributes by their name and not their position:

<xsl:for-each select="//Map[@schema]/attribute::*[name() != 'col0']">

Furthermore maybe you can replace '//' with a more explicite XPath 
expression.

>       <xsl:variable name="AttrName" select="name()"/>
>       <xsl:choose>
>             <xsl:when test="bitmask:DeCode(current(), 2) " >
>                   <xsl:variable name="Pos" >
>                          <xsl:value-of select="MapKey/@*[name() =
> $AttrName]" />
>                   </xsl:variable>
Here you are creating a Result Tree Fragment, that later has to be 
converted into a string. I think it's better to write

<xsl:variable name="Pos" select="MapKey/@*[name() = $AttrName]"/>

to have already a string stored in the variable.

>                   2 - (<xsl:value-of select="$Pos" />)(<xsl:value-of
> select="$AttrName" />) <xsl:value-of select="$Key/attribute::*[$Pos]" />
>             </xsl:when>
>             <xsl:when test="bitmask:DeCode(current(), 4) " >
>                   <xsl:variable name="Pos" >
>                         <xsl:value-of select="MapMD/attribute::*[name() =
> $AttrName]" />
>                   </xsl:variable>
Same here.

>                   4(<xsl:value-of select="$Pos" />)(<xsl:value-of
> select="$AttrName" />) <xsl:value-of select="$Market/attribute::*[position()
> = $Pos]" />
Again attributes and position(). Try to refer to attributes by their 
name - if possible in any way.

>             </xsl:when>
>       </xsl:choose>
>       <xsl:if test = "position() != last()"> | </xsl:if>
>    </xsl:for-each>
> </xsl:attribute>
Regards,

Joerg


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