PVA access permissions info #3506
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Compared to Channel Access, PV Access lacks access permissions info.
A client like an operator display cannot show that a PV is read-only.
Users would only notice when writing and then receiving an error that a PV is actually read-only.
This is a proposal for a protocol update to be discussed with PVXS developers.
./serverdemocreates PVs "demo" (read-only) and "demo3" (writable).A display with
pva://demoandpva://demo3will reflect write access or lack thereof: