Joining sequence and document in XQUERY - xquery

Question

I want to join document and sequence in XQUERY.
I'am trying this code:
let $in_xml :=
<ss>
<s>
<p>2016/2/18/11/protocol13818.xml</p>
<n>service1_1</n>
<d>2016-04-01</d>
</s>
<s>
<p>2016/2/18/15/protocol13819.xml</p>
<n>service_2</n>
<d>2016-04-02</d>
</s>
</ss>
for $a in /version,
$i in $in_xml
where $a/fn:base-uri() = $i/s/p
return <a>{$a//id/value/text()," ", $i//n}</a>
And having this result:
<a>c2e9bb01-acc1-4a64-b39b-f30ef514c5ec <n>service1_1</n>
<n>service_2</n>
</a>
<a>50543b71-48b8-41f6-956e-b444c5ad0abe <n>service1_1</n>
<n>service_2</n>
</a>
Why sequence is not filtered?
I want, that result will be look like this:
<a>c2e9bb01-acc1-4a64-b39b-f30ef514c5ec <n>service1_1</n>
</a>
<a>50543b71-48b8-41f6-956e-b444c5ad0abe <n>service1_2</n>
</a>
How can i do this? Any ideas? Thanks!

Answer 1

When you do $i in $in_xml, you iterate over every element in $in_xml, which is just $in_xml itself, since it is an element and not a sequence. To iterate over all the children of $in_xml, you need to select them:
You want something like
for $a in /version,
$i in $in_xml/s
where $a/fn:base-uri() = $i/p
return <a>{$a//id/value/text()," ", $i/n}</a>