xlst 2.0 seqential analysys of elements

[Rolf Kemper]

Dear ALL,

I have an xml containing an order of elements which is quite big (Mega
Bytes)
Example:
<root>
<e1 />
<e5 />
<e3 />
<e2 />
<e5 />
<e2 />
<e1 />
</root>

What I want to do is to look for a ceratin sequence of elements:
e.g. e5,e2 (e5 must be followed by e2)
e.g. e5,*,e2 (which left out e3)

In a matching template or foreach I have only the current element in
scope.
A variable used in that scope is re-defined in next match. Hence this
does not help.
How can this be solved somehow

Any hint is welcome
Rolf

 

[Joe Kesselman]

What I want to do is to look for a ceratin sequence of elements:

I'd start with the child, preceding-sibling, and/or following-sibling
axes and predicates -- most importantly, I suspect, positional predicates.


--
Joe Kesselman,
http://www.love-song-productions.com/people/keshlam/index.html

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[Martin Honnen]

Dear ALL,

I have an xml containing an order of elements which is quite big (Mega
Bytes)
Example:
<root>
<e1 />
<e5 />
<e3 />
<e2 />
<e5 />
<e2 />
<e1 />
</root>

What I want to do is to look for a ceratin sequence of elements:
e.g. e5,e2 (e5 must be followed by e2)
e.g. e5,*,e2 (which left out e3)

In a matching template or foreach I have only the current element in
scope.
A variable used in that scope is re-defined in next match. Hence this
does not help.
How can this be solved somehow

Doesn't
<xsl:template match="/">
<xsl:if test="root/e5[following-sibling::*[1][self::e2]]">
...
</xsl:if>
</xsl:template>
do the check for the first type of sequence you asked for?
The second would be
<xsl:if test="root/e5[following-sibling::*[1] and
following-sibling::*[2][self::e2]]">...</xsl:if>

Of course instead of an xsl:if check you could use such expressions in
an apply-templates or for-each, depending on what you want to do if you
find a sequence.