Query Language Extension
To extend the semantic query functionality with lexical search capabilities, a query language has been implemented in Snow Owl. This language combines the Expression Constraint Language with a term filter that runs a prefix match.
The expressivity of Snow Owl's Query Language has been further improved to support searching for inactive concepts, and the refinement of description term filters by description status, description type, and language reference.
To author these query expressions, a file with the extension .ql needs to be created in the workspace (similarly to the .ecl files that allow ECL expression authoring).
The following filters/configuration are available:
Filter/Configuration | Description |
active | To filter concept matches by their status |
description.active | To filter description matches in a term filter by their status |
typeID | To filter description matches in a term filter by their type concept ID (the value should be an ECL expression) |
languageRefSetId | Accepts ECL expression, matches descriptions wherein the select Language Reference Set the description has a language reference set member with any acceptability value |
acceptableIn | Accepts ECL expression, matches descriptions wherein the select Language Reference Set the description has a Language Reference Set member with acceptable acceptability value |
preferredIn | Accepts ECL expression, matches descriptions wherein the select Language Reference Set the description has a Language Reference Set member with preferred acceptability value |
term = regex | To enable regular expression mode when filtering descriptions by their terms |
term = exact | To filter descriptions by searching for an exact phrase |
