@@ -369,3 +369,11 @@ Remaining content schemas (\~26x) are usable, but have not undergone this same l
* In the Supported Data Types wiki page
* In the schemas themselves under the attribute called `x-osdu-review-status`
### 12. The content schemas for the RAFS DDMS have a "Meta" block that appears similar to that of the OSDU catalog schemas. How is this meta block similar or different from that of the OSDU catalog schemas?
As of the M25 (March 2025) release, the Meta block of the content schemas is used to identify and define the unit of measure for each relevant attribute in the schema. This is similar to its use in the catalog schemas.
However, this Meta block in the DDMS content schemas does not contribute to the "normalization" of any units of measure in the RAFS DDMS. The RAFS DDMS does not today do unit of measure normalization. It is possible that in the future, the RAFS DDMS will do unit of measure normalization like the Core Services do with catalog schemas; That question is under discussion at this time.
You can read more about how the catalog schemas using this "meta" block and how it relates to normalization in the OSDU Core Services [here in the OSDU Schema Usage Guide](https://community.opengroup.org/osdu/data/data-definitions/-/blob/master/Guides/Chapters/04-FrameOfReference.md)(Frame of Reference section).
