Stream: C-CDA
Topic: C-CDA Rubric
Matt Rahn (Jan 13 2019 at 16:17):
Here is the page where people can add potential rubric for discussion http://wiki.hl7.org/index.php?title=C-CDA_Scorecard_Rubric_Update
Matt Rahn (Jan 13 2019 at 16:18):
Here is the page where people can add potential rubric for discussion http://wiki.hl7.org/index.php?title=C-CDA_Scorecard_Rubric_Update
The rubric that was approved in August are attached there too. I do need to do some cleanup to the wiki page.
Emma Jones (Jan 13 2019 at 22:44):
Why is PQ data type required to have a unit of measure when the datatype itself does not specify that? If this is the rule, does all PQ have to have a unit? Please see
https://groups.google.com/forum/#!topic/edge-test-tool/PfFu359S69E
Christof Gessner (Jan 28 2019 at 19:30):
The CDA XML Implementation Technology Specification - Data Types 2.28.2 Unit of Measure states that "The default unit of measure is 1 (the "unity")." So if unit is not present in a PQ, it takes the value 1.
C-CDA CONF:1198-31484 states that "If Observation/value is a physical quantity (xsi:type="PQ"), the unit of measure SHALL be selected from ValueSet UnitsOfMeasureCaseSensitive 2.16.840.1.113883.1.11.12839 DYNAMIC"
The value set contains "All units of measure". So it clearly includes "1", which is a valid UCUM code.
My conclusion: The unit attribute may be omitted in PQ, if and only if it assumes the value "1", the default value.
Brett Marquard (Jan 29 2019 at 01:29):
I am a little unclear why requiring systems include a unit is problematic -- in C-CDA we did our best to help the implementer that didn't even know how to find section 2.28.2 of the data types
Christof Gessner (Jan 29 2019 at 09:02):
No problem with that C-CDA constraint. I just tried to help understanding the source of that requirement.
Last updated: Apr 12 2022 at 19:14 UTC
