Concepts have distinct semantic and measurement levels that operate independently.

Evidence

A key feature of the basic framework is that it includes a semantic, definitional, ontological level along with a separate measurement, data level. It is not uncommon to find ambiguity and confusion about the semantic versus the data levels. The basic framework separates the two but it is often not clear in practice because one moves directly from the indicators to the basic level. In my terms, it is not a multilevel concept. — Gary Goertz, Social Science Concepts and Measurement, 283

Categorization

• DEFINE: Labels the two-level structure of a concept: semantic/ontological versus data/measurement, with ‘multilevel concept’ as the term for those keeping them distinct.
• XREF: Echoes the operationalization-vs-definition distinction in measurement literature and the semantics/pragmatics split in linguistics.