Rule POS

engine="rule" (the default, and the only engine wired into BurmeseNLP.process()). Stages:

1. Candidates — lexicon + closed-class heuristics (incl. သည် as POSTP/SFP/PART).
2. Context rules — filter per token (subject marker vs finite particle).
3. Grammar / sequence rules — multi-token patterns.
4. Preference — TAG_PREFERENCE among remaining tags.

BMWE indices override candidates to the span's resolved POS before disambiguation. Confirmed gazetteer entity spans similarly override the final tags to PROPN afterward — see Pipeline order.

engine="xlmr" is a second, unrelated engine (see POS tagging): a transformer model with its own myPOS-style tagset, standalone only.