XPath : Attribute Compare

Question

I am looking for a solution to frame xpath logic to compare attributes.

<menucontainer id="menu1" op="o3" indicator="highlight">
<menubox>
<menutitle>TITLE</menutitle>
<menuoptionlist>
<menuoption id="o1">Select a path from below :</menuoption>
<menuoption id="o2">IMAGE1</menuoption>
<menuoption id="o3">IMAGE2</menuoption>
<menuoption id="o4">IMAGE3</menuoption>
<menuoption id="o5">IMAGE4</menuoption>
<menuoption id="o6">IMAGE5</menuoption>
</menuoptionlist>
</menubox>
</menucontainer>

Here I want to compare menucontainers op value (op="03") against the menuoption id's.So here the ideal match would be IMAGE2. And I would be highlighting the IMAGE2 in red colour.

I tried //menublock/menucontainer/@op = //menublock/menucontainer/menuoptionlist/menuoption/@id

but it is not dynamic.It checks first result and applies the same result everywhere.pls help in framing the xpath .

Answer 1

To return the node menuoption where the value is IMAGE2, based on the menuoption attribute id being equal to the menucontainer attribute op you can use the following XPath Selector //menucontainer/menubox/menuoptionlist/menuoption[@id=../../../@op]

The ../ goes up a level. W3schools XPath Syntax

XPathFiddle

Answer 2

With the help of my crystal ball, i present you a solution.

XPATH: //menuoption[@id = ancestor::menucontainer/@op] [you can restrict the //menuoption as you want/needed.]

XSLT 1.0:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:output method="xml"/>

    <xsl:template match="menuoption[@id = ancestor::menucontainer/@op]">
        <xsl:copy>
            <xsl:apply-templates select="@*"/>
            <!-- add a specific attribute -->
            <xsl:attribute name="highlight">
                <xsl:text>red</xsl:text>
            </xsl:attribute>
            <xsl:apply-templates />
        </xsl:copy>        
    </xsl:template>

    <!-- identity copy -->
    <xsl:template match="@* | node()">
        <xsl:copy>
            <xsl:apply-templates select="@* | node()"/>
        </xsl:copy>
    </xsl:template>

</xsl:stylesheet>

Change the attribute highlight to whatever you want. Fit these templates in your environment. [Crystal ball got a crack]