Scope and Usage

This profile defines extensions that can be used to describe the additional characteristics that must be held by a data element.

Data elements can be defined in several places. The extensions defined within this profile may apply to most or all of these:

• StructureDefinition.*.element - defining the characteristics of the data elements and extensions when used according to the profile
• Questionnaire.item - defining the characteristics of permitted answers

Note: Implementations are not required to reject invalid data. However, transmitting data that violates one of these extensions would be considered invalid against the resource that declared the extension.

The extensions provided here fall into several categories:

• Length-related (govern allowed length of an element): minLength, maxLength
• Format (govern the appearance of string and string-like simple data types): entryFormat
• Numeric/date (govern the allowed range of numeric, date or time data types): minValue, maxValue, maxDecimalPlaces
• Attachment-related (govern allowed attachments): mimeType, maxSize