RelaxNG XML attribute/node completion not working

[ImBoop]

Hello!

I'm enjoying the extension thus far, but I'm having an issue where the completion provider doesn't seem to be working.

It correctly identifies errors in attributes/etc (such as one existing where it shouldn't) however the completion doesn't seem to be working.

I attempted this on a fresh install of VScode (version below) with just the RH XML extension active.

Version: 1.107.1 (user setup)
Commit: 994fd12f8d3a5aa16f17d42c041e5809167e845a
Date: 2025-12-17T14:15:14.850Z
Electron: 39.2.3
ElectronBuildId: 12895514
Chromium: 142.0.7444.175
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26200

Here's the debug output:

[Trace - 7:41:18 PM] Sending request 'textDocument/completion - (21)'.
Params: {
    "textDocument": {
        "uri": ".../filename.xml"
    },
    "position": {
        "line": 3,
        "character": 8
    },
    "context": {
        "triggerKind": 1
    }
}


[Trace - 7:41:18 PM] Received response 'textDocument/completion - (21)' in 2ms.
Result: {
    "isIncomplete": false,
    "items": [],
    "itemDefaults": {}
}

The document in question (I'm trying to autocomplete attributes on the record)

<?xml-model href="../../../odoo/import_xml.rng"?>
<odoo>
<record  ></record>
</odoo>

The RNG XML file in question can be found here.

I have a feeling there's something awry with Lemminx, but I don't know enough about it to dig deeper. If y'all need anything else to help reproduce it, let me know!

[angelozerr]

Thanks @ImBoop to report your issue. Unfortunately we are busy with other projects and it is hard for us to find time to fix this kind of issue.

You are right, problem comes from LemMinx, if you could be interested to contribute it, I will be happy to assist you.