I have the following map of maps:

<map:map xmlns:map="http://marklogic.com/xdmp/map" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<map:entry key="101201">
<map:value>
"content"
</map:value>
</map:entry>
... more maps ...

Now I would like to search/filter the map based on the key using a wildcard.

Actually I want to filter based on the first 4 characters of the key="101201" so key="1012**".

Question: Give me all maps that have a key that is matching '1012*' ...

Can that be done efficiently?

tx for your time

hugo