We’ve talked about having a glossary.


Here’s my quick 30 minute stab at starting one:


EPICS - a set of Open Source software tools, libraries and applications developed collaboratively and used worldwide to create distributed soft real-time control and data acquisition systems for scientific instruments such as a particle accelerators, telescopes and other large scientific experiments.


EPICS Version 3 - a collection of EPICS developments that focuses on creating real-time control systems


EPICS Version 4 - a collection of EPICS developments that adds structured data and is targeted at middlelayer services and data acquisition.


Channel Access - the EPICS Version 3 communication protocol


pvAccess - the EPICS Version 4 communication protocol


Channel - a connection to a single named resource that resides on a server


Process Variable  - (PV for short) is a dynamical quantity and its associated local processing semantics, as understood by process control systems.


Process Variable Channel - a channel which is a connection to a process variable


PV - see process variable


Record - a memory resident data structure with behaviour, used to implement channel by an implementation of a local provider [ok - needs work]

Database - a collection of records [again, needs work]


PVRecord - the implementation of a record in pvDatabase and pvIOCJava




Local provider

Local channel














I am busy, but I’m reasonably enthused by this to be happy to continue and do a first draft of a glossary for discussion.







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