Lossless transcoding between CartoSym CSS and other OGC Style & Symbology encodings (CS-JSON, SLD/SE), plus MapLibre Style as an interoperability target
A pure-Python INTERLIS 2 toolkit: build a live metamodel from .ili, validate .xtf transfers, and convert to/from JSON Schema, OGC JSON-FG, PostgreSQL/GeoPackage SQL, and CQL2-JSON filters
