Cooking with CQL Q&A: eCQM Specifications and CQL

Each Q&A has the Cooking with CQL session number and date. For the most current and accurate information, please check the CQL Qs&As for a more recent answer to your question.

Age-based Risk Factors: Can the age-based risk factors example be plugged into the Measure Authoring Tool or tested with Bonnie? The way CQL is structured, the ‘defines’ are listed programmatically. (Session 32 - 2/28/19)

• Yes, the way that ‘defines’ are listed in CQL allows them to be forward referenced anywhere in the library.

Flattening in CQL Is flattening part of CQL? (Session 32 - 2/28/19)

• Yes. The ‘flatten’ operator takes a ‘list of lists’ and returns a single list with all the elements of the lists in the input.

Not Equivalent Comparison: For the follow-up HIV visit logic, explain why the not equivalent comparison is not needed and when it could be needed. (Session 32 - 2/28/19)

• It is needed when using the ‘on’ and after’. When using only ‘after’ it would not be needed.