Assertion: expression | /r/HasProperty | syntactic entity
Facets:
Source sentences:
text: An expression in a programming language is a syntactic entity that may be evaluated to determine its value.
text: An expression is a syntactic construct, it must be well-formed: the allowed operators must have the correct number of inputs in the correct places, the characters that make up these inputs must be valid, have a clear order of operations, etc.