Query type Reference Sets

Query type Reference Sets are referring to a Simple type Reference Set and associating it with an ECL query. The referenced Simple type Reference Set contains the results of the query expression producing a subset of concepts, descriptions, or relationships. It is generated automatically and can be updated easily to reflect the changes of a new release.

When saving a Query type Reference Set, the queries are executed and the new Simple type Reference Sets are automatically generated. The queries can be run against future releases to generate an updated set of subset members.

To create a new Query type Reference Set, right-click on the Query specification type navigational node and select the New query type reference set... Context Menu option.

Adding Query Reference Set members

To add a query member:

• Click the Add new reference set member button in the editor's toolbar.

You can enter ECL expression in the Query section of the wizard. At any point during entering a query, the content assist can be invoked by hitting Ctrl + Space. When the content assist is invoked, users can pick from the different valid selections.

You can also choose an existing query. Clicking the Browse... button will open the Workplace folder in a file browser, where you can select an existing ecl file to define the content of the new Simple type Reference Set.

To learn more about queries in Snow Owl, please refer to the Semantic Queries section:

The module of the Query type Reference Set member can also be set on the first page of the wizard. To be able to see the module of the memberships, enable the Module ID column in the Reference Set Editor table of the Preference Page.

The next page of the wizard regards the Simple type Reference Set:

• Specify the properties of a new Simple type Reference Set, or

• Choose an existing one – the content of which will be overwritten with the results of the query.

Once all required properties are specified, hit Finish to add the member. The query is displayed for each member in the Reference Set table.

After saving the Query type Reference Set, the queries are executed and the new Simple type Reference Sets are automatically generated. The queries can be run against future releases to generate an updated set of subset members.

Updating Query type Reference Sets:

• Right-click on the Query type Reference Set and choose the Update Query Reference Set Context Menu option.

The results of the process are displayed in the Update Query Reference Set Wizard. Click on a member to review details and choose which Simple type Reference Set member to update.