Allow mixture of W, D etc in ISO8601 Duration (deviation from standard)

Description

Currently, openEHR follows the ISO8601 standard strictly. For durations this means that
PnnW or PnnYnnMnnDTnnHnnMnnS are allowed, but not a mixture. However, in clinical medicine
it is common to specify durations of pregnancies in a combination of weeks and days.

Status

Assignee

JeffJ

Reporter

(Sam Heard) inactive

Raised By

None

Priority

Trivial
Configure