QDM Related Formatting Conventions

QDM-Specific Formatting Conventions

In addition to general CQL Formatting Conventions, the following guidelines are intended to promote consistency and reusability of CQL developed for measures that use the Quality Data Model (QDM) to represent patient information.

Named Expression Identifiers

Identifiers for top-level named expressions should follow these guidelines:

• Always use quoted identifiers
• Use Title Case and appropriate spacing
• Provide a descriptive, meaningful name

Data Type Names

• Always use quoted identifiers
• Use PascalCase plus appropriate spacing
• Use the friendly name ["Encounter, Performed"]

Attribute Names

• Never use quoted identifiers
• Use camelCase admissionDateTime

Aliases

• Never use quoted identifiers
• Use PascalCase Encounter
• Don't use abbreviations MedicationOrder
• Use descriptive names AsthmaMedication