Question

I have 2 xml files. I would like wite xsl program
that eliminates (and create an new xml) all the nodes of SearchApp_MA_Request from SearchApp_LA_Request when Field4 and field5 and field6 are same in both files.

SearchApp_LA_Request.xml

<Request>
    <Rows>
        <Row1>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row1>
        <Row2>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row2>
        <Row3>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row3>
        <Row4>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row4>
    </Rows>
</Request>

SearchApp_MA_Request.xml

<Request>
    <Rows>
        <Row1>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row1>
        <Row2>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row2>
        <Row3>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row3>
        <Row4>
            <Field1>Item1</Field1>
            <Field2>Item2</Field2>
            <Field3>Item3</Field3>
            <Field4>Item4</Field4>
            <Field5>Item5</Field5>
            <Field6>Item6</Field6>
        </Row4>
    </Rows>
</Request>

Answer 1

Yes,

I googled your question (using keywords merge xml xslt) and found this resource which seems to hit your question spot on: ‘Merge Two Files’ http://www.dpawson.co.uk/xsl/sect2/merge.html#d7584e19

[facimilie from link above]

Michael Kay

> I have two documents, file A and file B.  I want to join them 
> on the id of
> the first, but only if a matching id is in the 2nd.  How do I do this?
> 
> File A              File B               Desired Output
> <id> A </id>        <id> A </id>         <id> A </id>
> <id> B </id>        <id> C </id>         <id> D </id>
> <id> D </id>        <id> D </id>
> 

<xsl:copy-of select="document('a.xml')//id[.=document('b.xml')//id]"/>

The solutions uses the xslt function document() which can access nodes in a xml document. More info about that you can find on w3school: http://www.w3schools.com/Xsl/func_document.asp