Facet vocabulary

Derivation

2 terms

Controlled vocabulary recording the epistemic origin of a file's values: whether they were empirically observed (measured from experimental sequencing data) or computationally predicted (generated by a statistical/computational model rather than directly measured). A small facet vocabulary that factors the measured-vs-model qualifier out of compound ENCODE output_type / DataType / FeatureType terms (e.g. "observed signal profile", "predicted signal profile", "predicted transcription start sites"). A provenance facet: it records how the values were obtained, not what they mean. An absent value means the derivation is unspecified (not a default of observed). The vocabulary is deliberately two-valued; control is excluded because it denotes an experimental role or a normalization reference, not the measured-vs-model axis. Surfaced via the Track Provenance schema's derivation slot. Aligned with FGA-WG issue #2 (data interpretation).