How to make this specific query using xslt 2.0?

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Hi All,

The Below mentioned content is my XML Document.

<w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">

    <w:body>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading1" />
                    </w:ppr>
                    <w:r>
                          <w:t>Para1</w:t>
                     </w:r>
             </w:p>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading2" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para2</w:t>
                     </w:r>
             </w:p>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading3" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para3</w:t>
                     </w:r>
             </w:p>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading4" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para4</w:t>
                     </w:r>
             </w:p>

            <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading1" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para5</w:t>
                     </w:r>
             </w:p>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading3" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para6</w:t>
                     </w:r>
             </w:p>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading4" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para7</w:t>
                     </w:r>
             </w:p>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading2" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para8</w:t>
                     </w:r>
             </w:p>

             <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading3" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para9</w:t>
                     </w:r>
             </w:p>

            <w:p>
                   <w:ppr>
                          <w:pstyle w:val="Heading1" />
                   </w:ppr>
                    <w:r>
                          <w:t>Para10</w:t>
                     </w:r>
             </w:p>

    </w:body>

</w:document>

So, While reading each <w:p xmlns:w="#unknown">, i want to check its w:pPr -> w:pStyle attribute value w:val.For example, in the above file,the first w:p contains that(w:pPr->w:pStyle) attribute value as "Heading1". So, For the first w:p>, i don't care about anything and just take it.After, taken this w:p,

Logic 1 :i want to split the attribute value Heading1 for retrieving strings after the Heading. So,Now we get 1.

Afterwards, the While reading next w:p,Apply the same Logic 1 for spiting the current attribute value.So,in this case, we have 2. Now, i want to compare this current value 2 with previous value 1.

Logic 2 : If it is less than the previous value then only select the current w:p,otherwise,don't do anything.

Apply the above Logic 1 and Logic 2 for all of the w:p nodes.

So,In my case, I want to select, only the following w:p nodes.

Required Selection is :

Para1
Para5
Para8
Para10

Hope u understood my problem...

What i do for this situation?...

Please Guide me to get out of this issue...

Thanks & Regards,
P.SARAVANAN