[MarkLogic Dev General] Set Operations

[Gnana Thomas Arockiam]

 Team,
I have following two xmls,

*\test\BookCatalog.xml*

<catalog>
<book id="101">
 <author>Gambardella, Matthew</author>
 <title>XML Developer's Guide</title>
</book>

<book id="102">
 <author>Ralls, Kim</author>
 <title>Midnight Rain</title>
</book>
</catalog>
 *\test\NewBookCatalog.xml*
<catalog>
<book id="101">
 <author>Gambardella, Matthew</author>
 <title>XML Developer's Guide</title>
</book>

<book id="103">
 <author>Corets, Eva</author>
 <title>Oberon's Legacy</title>
</book>
</catalog>

 While I use the set operations intersect, difference, union on book tags of
these two xmls I am not getting the desire output. I was expecting a result
set which contain the book tag with id "101" while doing an intersection
operation. I tried in the following way which gave me the empty sequence as
result

let $a := doc("\test\BookCatalog.xml")/catalog/book

let $b := doc("\test\NewBookCatalog.xml")/catalog/book

return

$a intersect $b

Please let me know if I can achieve the desired output sequences using set
operations

Regards,
Thomas
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