XQuery - Problem with map merging - Execution xbase - xpath

Question

I am very new in xquery and I have a problem, that I can't get solved.
I want to iterate a xml and save some entries in a map. So that I can merge the same keys with different values (StringValue1, StringValue2). At the end I want to return the complete map and save it to a file. Following you find my code. And I using xbase to execute these xquerys.
CODE
declare namespace functx = "http://www.functx.com";
(: Function should merge the values, if the map contains the key, else it should put the new entrie to the map.:)
declare function functx:pnMap($map as map(*), $key as xs:anyAtomicType, $value as item()*) as map(*) {
if(map:contains($map, $key)) then (map:merge(($map, map{$key:$value}), map{"duplicates":"combine"})) else map:merge((map{ $key: $value }, $map))
} ;
let $pnMap := map{}
for $x in doc('file:///D:/Software/BaseX932/basex/input/MyXML.xml')/PFA/Records/Entity
return functx:pnMap($pnMap, substring-before((substring-after(data($x/BigUnsortedStringField), 'Owner: ')), '
'), string-join(('Position=Owner | ', 'EntityID=', data($x/#id),' | ', 'SomeOtherNo=', data($x/IDNumberTypes/ID[#IDType="StringWhereIfindsomeOtherNumber"])), ''))
RESULT
map {
"Nick": "Position=Owner | EntityID=625115 | SomeOtherNo=7206512"
}
map {
"James": "Position=Owner | EntityID=1016624 | SomeOtherNo=9138056"
}
map {
"Nick": "Position=Owner | EntityID=1016625 | SomeOtherNo=9051648"
}
map {
"Pete": "Position=Owner | EntityID=1016626 | SomeOtherNo=9051636"
}
map {
"Jon": "Position=Owner | EntityID=1016675 | SomeOtherNo=9349667"
}
Expected Result 1
map {
"Nick": "Position=Owner | EntityID=625115 | SomeOtherNo=7206512, Position=Owner | EntityID=1016625 | SomeOtherNo=9051648"
"James": "Position=Owner | EntityID=1016624 | SomeOtherNo=9138056"
"Pete": "Position=Owner | EntityID=1016626 | SomeOtherNo=9051636"
"Jon": "Position=Owner | EntityID=1016675 | SomeOtherNo=9349667"
}
This is an abbreviated excerpt from the XML:
<Entity id="1016626">
<Status>Active</Status>
<IDNumberTypes>
<ID IDType="SomeOtherNo">
<IDValue>9051636</IDValue>
</ID>
</IDNumberTypes>
<BigUnsortedStringField>Some text
Owner: Pete
Sister: Magrit
Next Line text
more text
</BigUnsortedStringField>
</Entity>
<Entity>
....
</Entity>

Answer 1

I think you want
map:merge(
doc('file:///D:/Software/BaseX932/basex/input/MyXML.xml')/PFA/Records/Entity !
map:entry(
substring-before(substring-after(BigUnsortedStringField, 'Owner: '), '
'),
string-join(('Position=Owner', 'EntityID=' || #id, 'SomeOtherNo=' || IDNumberTypes/ID[#IDType="StringWhereIfindsomeOtherNumber"]), ' | ')
),
map { 'duplicates' : 'combine' }
)
but it is hard to write code without seeing the XML input.
As an alternative you could also try to use XQuery group by first on the data you want and then create the map of the result of the grouping:
map:merge(
for $entity in doc('file:///D:/Software/BaseX932/basex/input/MyXML.xml')/PFA/Records/Entity
group by $owner := substring-before(substring-after($entity/BigUnsortedStringField, 'Owner: '), '
')
return
map:entry($owner, string-join(
$entity!string-join(('Position=Owner', 'EntityID=' || #id, 'SomeOtherNo=' || IDNumberTypes/ID[#IDType="StringWhereIfindsomeOtherNumber"]), ' | '), ' , '))
)