Non-Coding RNA Ontology (NCRO)
The NCRO is a reference ontology in the non-coding RNA (ncRNA) field, aiming to provide a common set of terms and relations that will facilitate the curation, analysis, exchange, sharing, and management of ncRNA structural, functional, and sequence data. Domain includes both natural and engineered RNA.
Current released version will always be available at http://purl.obolibrary.org/obo/ncro.owl (note there is no released version at the moment)
Development HEAD at http://purl.obolibrary.org/obo/ncro/dev/ncro.owl