Get certified for free when you join Fabric Data Days 2026 and dive into Fabric, Power BI, SQL, AI, and other essential data skills.
Join nowData Days is here! Join us now for 60+ days of learning, challenges, and connection. Learn more
I can't find a lookup for the values in this field, can anyone point me in the right direction? Thanks!
Solved! Go to Solution.
The `category.source.type` has to values that determine the real type if you are really interested: the `primitaveType` and the `extendedType`.
Both are enums and a pretty accurate definition is available at:
In case of the screenshot Ignat: the primitiveType is 3 (`Double`) and extendedType 259 (`Double`).
And to determine the difference between a `Double` and `Decimal` is the extendedType property: `259` vs `258`
-JP
Not sure if understand the issue well. Do you want to detect column type?
Ignat Vilesov,
Software Engineer
Microsoft Power BI Custom Visuals
Yes, exactly. This has numeric codes, I'd like to know what they map to.
To detect column type please use metadata.type.numeric
Ignat Vilesov,
Software Engineer
Microsoft Power BI Custom Visuals
Other parts of the API appear to distinguish "double" from "decimal". So that "valueEncoded" for a numeric might be digits followed by an M or a D (or L for integer). How to distinguish "double" from "decimal"?
As seen here in the PrimitiveValueEncoding class https://github.com/deldersveld/PowerBI-visuals/blob/master/src/Clients/VisualsData/semanticQuery/pri...
The `category.source.type` has to values that determine the real type if you are really interested: the `primitaveType` and the `extendedType`.
Both are enums and a pretty accurate definition is available at:
In case of the screenshot Ignat: the primitiveType is 3 (`Double`) and extendedType 259 (`Double`).
And to determine the difference between a `Double` and `Decimal` is the extendedType property: `259` vs `258`
-JP
Don't miss out on Data Days, June 15 through August 7. Learn Fabric, Power BI, SQL, AI and more.
Check out the May 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 |