On Wednesday 26 October 2005 00:33, Jeff Hill wrote:
> Attached is a rough cut at the EPICS V4 CA protocol specification.
Hi Jeff,
In section "IO Request Modifier Expression", tehre are two definitions
for the non-terminal <Property Match Expression>. Which is the correct
one?
The first one mentions a <Property Match Specification> which is nowhere
defined.
You seem to use the meta-syntax {alt_1, ... , alt_n} to denote
alternatives. Since this is non-standard notation, could you please add
a short note explaining the meta-syntax or else use standard (E)BNF
(i.e. '|' to separate alternatives)?
One comment: Instead of mixing Request Attributes with Match
Expressions, we could encode the Request Attributes with a standard
Property Sequence, where maxPeriod,...,propertyPath are pre-defined
properties.
Ben
- References:
- CA V4 Protocol Specification Jeff Hill
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