Re: [xsl] XML/XSLT Problem

[Joerg Heinicke <joerg.heinicke@xxxxxx>]

Hi Alex,

test if this stylesheet meets your expectations:

<xsl:template match="abc">
    <xsl:copy>
        <xsl:apply-templates select="PP"/>
    </xsl:copy>
</xsl:template>

<xsl:template match="PP">
    <Group>
        <xsl:copy-of select="."/>
        <xsl:apply-templates select="../IP[@id = current()/IPI/@id]"/>
    </Group>
</xsl:template>

<xsl:template match="IP">
    <xsl:copy-of select="."/>
    <xsl:apply-templates select="../PR[@id = current()/@id-1]"/>
</xsl:template>

<xsl:template match="PR">
    <xsl:copy-of select="."/>
</xsl:template>


XML input

<abc>
    <PP id="111" id-1="222" >
      <IPI id="333" id-2="444" >
       <p1>p1p1p1</p1>
      </IPI>
      <IPI id="sss" id-2="666" >
       <p1>p2p2p2</p1>
      </IPI>
    </PP>
    <PP id="777" id-1="888" >
      <IPI id="123" id-2="234" >
       <p1>p3p3p3</p1>
      </IPI>
      <IPI id="456" id-2="567" >
       <p1>p4p4p4</p1>
      </IPI>
    </PP>
    <IP id="rrr" id-1="aaa">
      <i1>i1i1i1</i1>
    </IP>
    <IP id="sss" id-1="bbb">
      <i1>i2i2i2</i1>
    </IP>
    <IP id="ttt" id-1="ccc">
      <i1>i3i3i3</i1>
    </IP>
    <IP id="uuu" id-1="ddd">
      <i1>i4i4i4</i1>
    </IP>
    <PR id="xxx">
      <r1>r1r1r1</r1>
    </PR>
    <PR id="bbb">
      <r1>r2r2r2</r1>
    </PR>
    <PR id="zzz">
      <r1>r3r3r3</r1>
    </PR>
</abc>


XML output

<abc>
    <Group>
        <PP id="111" id-1="222">
            <IPI id="333" id-2="444">
                <p1>p1p1p1</p1>
            </IPI>
            <IPI id="sss" id-2="666">
                <p1>p2p2p2</p1>
            </IPI>
        </PP>
        <IP id="sss" id-1="bbb">
            <i1>i2i2i2</i1>
        </IP>
        <PR id="bbb">
            <r1>r2r2r2</r1>
        </PR>
    </Group>
    <Group>
        <PP id="777" id-1="888">
            <IPI id="123" id-2="234">
                <p1>p3p3p3</p1>
            </IPI>
            <IPI id="456" id-2="567">
                <p1>p4p4p4</p1>
            </IPI>
        </PP>
    </Group>
</abc>

If the file is much bigger and you have to compare many elements by 
their @id's, it's better to setup keys and use them for faster element 
access.

Regards,

Joerg


Alex Genis wrote:
> Hi, G.Ken.
> Thanks a lot for your help. Your XSLT works perfectly.
> But this is not exactly what I was looking for (maybe because I've
> described my task not clear enough).
>
> 1. What if an input XML Document contains a few groups (each of which
> contains  "PP", "IP" and "PR" elements
>     connected between each other by the same condition: (PP/IPI/@id =
> IP/@id) and (IP/@id-1 = PR/@id))?
>     When I tested your Stylesheet I've created such input XML Document and
> result XML looked like :
>     <abc>
>        <PP id="..." id-1="...">
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>        </PP>
>        <PP id="..." id-1="...">
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>        </PP>
>        <IP id="..." id-1="...">
>           <i1>...</i1>
>        </IP>
>        <IP id="..." id-1="...">
>           <i1>...</i1>
>        </IP>
>        <PR id="...">
>           <r1>...</r1>
>        </PR>
>        <PR id="...">
>           <r1>...</r1>
>        </PR>
>    </abc>
>
> My question is: how can I combine them like:
>
> <abc>
>     <Group>
>         <PP id="..." id-1="...">
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>         </PP>
>         <IP id="..." id-1="...">
>               <i1>...</i1>
>         </IP>
>         <PR id="...">
>              <r1>...</r1>
>        </PR>
>     </Group>
>     <Group>
>         <PP id="..." id-1="...">
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>            <IPI id="..." id-2="...">
>                 <p1>....</p1>
>            </IPI>
>         </PP>
>         <IP id="..." id-1="...">
>               <i1>...</i1>
>         </IP>
>         <PR id="...">
>              <r1>...</r1>
>        </PR>
>      </Group>
>   </abc>
>
>   where each group contains only elements connected between each other by
> condition (above).
>
> Because my task is :
>     To create for each such group set of output elements.
>     Each of this output element must contain children value of which should
> be generated
>          from an some attributes and elements of the appropriate group.
>
> Therefore I want those sets of "PP", "IP", and "PR" to be grouped -
> just to have a possibility reading this XML to use <xsl:for-each select
> ="Group">.....</xsl:for-each>.
>
> 2. And by the way does it mean that the task (above) must contain two
> steps:
>     a) XSLT-1  which creates  XML containing those groups;
>     b) XSLT-2  which reads this XML and create output elements for each
> group.
>    Or it's possible to perform this in one shot ?
>
> Thank you very much for your help again.


XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list