Metadata for an NTTable

["Cobb, Tom \(DLSLtd,RAL,LSCI\) via Tech-talk" <tech-talk at aps.anl.gov>]

Hi all,

We're in the process of writing a pythonSoftIOC that will allow every parameter from a PandABox to be set. It will create the records by introspecting the PandA at startup, then run an IOC which will expose them over CA and PVA (via QSRV). All of the parameter types map to NormativeTypes, but there is more metadata for tables than will fit in the NTTable spec. Specifically:

• All PandA table columns are integer type, but some should be interpreted as enums
• The tables are writeable, and have descriptions, units, low and high limits for each column

The first could be solved by adding an optional choices​ structure like enum_t with entries for the columns which are enums and the second could be solved by adding optional display​ and control​ structures like NTScalar with entries for each column with this metadata.

I could just add these to the IOC, but it would be good to discuss whether it is a good idea with others and make an addition to the normative types document.

Who would the right people be to discuss this with?

Thanks,

Tom

 

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