Module eval 

The evaluator: an expression constraint to the set of concept ordinals it selects, as set algebra over the materialized closure, the attribute graph, and the reference set tables of one edition.

The semantics are the ECL specification’s (https://docs.snomed.org/snomed-ct-specifications/snomed-ct-expression-constraint-language, the quick reference in Appendix D): < is the closure’s descendants, ^ the active members, a refinement the sources whose attribute rows satisfy the attributes with their cardinalities per role group, and the filters and history supplements restrict or extend the set. The edition is reached through Model; nothing here walks a graph edge by edge.

Enums

ConceptPredicate

One concept filter with its concept sets resolved, for the model.

DescriptionPredicate

One description filter with its concept sets and aliases resolved, for the model; every predicate of one {{ D ... }} must hold for the same description.

EvalError

A failure to evaluate.

Constants

HISTORICAL_ASSOCIATION

The historical association reference set root (900000000000522004 |Historical association reference set|).

PARTIALLY_EQUIVALENT_TO

1186924009 |PARTIALLY EQUIVALENT TO association reference set|.

REPLACED_BY

900000000000526001 |REPLACED BY association reference set|.

SAME_AS

900000000000527005 |SAME AS association reference set|.

WAS_A

900000000000528000 |WAS A association reference set|.

Traits

Model

The edition an expression is evaluated against.

Functions

evaluate

Evaluates constraint against model.

term_matches

Whether every word of a match term is a prefix of some word of text, case-insensitively, or a wild pattern matches the whole text.

wild_matches

Whether pattern, with * for any run of characters and \*, \", \\ for the literal characters, matches the whole of text (case-insensitively, as description matching is).