Variable Substitution XML - XPath with namespace is not working

[sbellerwork]

Current Behavior

When I use the variable substitution for xml XPath like $(xml:src/test/resources/document.xml:/namspace:root/path/to/node)

with a xml file looking like

<namespace:root>
    <path>
        <to>
            <node></node>
        </to>
    </path>
</namespace:root>

I get the following error

Bad XML key format ... expected format is DocumentPath:XPath.

Which is probably originating from here apache commons-text

Expected Behavior

When I use variable substitution with a namespace, I want to be able to substitute the variable.

Steps To Reproduce

1. Create a xml file with a namespace
e.g.
<namespace:root>
    <path>
        <to>
            <node></node>
        </to>
    </path>
</namespace:root>


2. in a realm.json document use the variable substitution with the xml file and a XPath including the namespace element
e.g.
$(xml:src/test/resources/document.xml:/namspace:root/path/to/node)

Environment

• Keycloak Version: [21]
• keycloak-config-cli Version: [keycloak-config-cli-21.0.1.jar]
• Java Version: [17]

Anything else?

Is there an option to use xml files with namespaces in another way?

Maybe there is an option to make the split char configurable? Could be necessary to change the definition of split char in the apache repo?