Hi Pablo, I see Seref has provided some technical input. Just a note on what AQL is for, and why it is a language with a parser etc. The goal is to have queries that rely only on archetypes, and that can be shared across systems and vendors, enabling CDS and other second level processing solutions to be economic. The point of having a language is that the language is standard for this purpose, and that in each type of installation, an interpreter, or pre-compiler or similar, converts the AQL statements to what they need to be in that installation. The result will usually be different for each different vendor / type of solution - due to different DB, schema etc.
The AQL grammars currently online are what is in use - AQL is in fact very stable. However it will certainly get upgraded this year, due to useful changes made by the guys at Marand, to do with server side processing, functions etc. We also need to upgrade its terminology handling and specify some of the semantics better, which Seref knows a lot about. - thomas On 17/12/2014 20:31, pablo pazos wrote: > Hi Seref, what I asked here was if anyone did implemented that, so I > don't have to :) > > As I said, my experience tells me it requires more hours-man to work > with a syntax, a model and a parser than having XML and parse parts of > it when required (so I can have 1. many ad-hoc parsers, 2. no model > just ad-hoc data structures, 3. no API, 4. no parser e.g. it requires > a lot of time to find a problem update the jj, generate the parser and > test). > > Hope that clarifies my vision. > > Of course, I didn't started yet to do anything about AQL support, just > trying to make the community aware that I'll do so and maybe generate > some collaboration momentum. Maybe the syntax definition is very > stable and there are a lot of good parsers for Java, but the syntax > definition I found seems to be old > (https://openehr.atlassian.net/wiki/display/spec/Archetype+Query+Language+Grammar > & > https://openehr.atlassian.net/wiki/display/spec/AQL-+Archetype+Query+Language) > > and I don't know about AQL parsers for Java (just found this old > discussion, no response about the parser: > http://lists.openehr.org/pipermail/openehr-technical_lists.openehr.org/2009-March/004400.html). > > I'm sure I need to do more research, but I doubt I can find the basic > building blocks, even to start working with AQL directly. > > Please if you know where I can find stuff to help me, any pointers > will be very welcome! -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/pipermail/openehr-technical_lists.openehr.org/attachments/20150119/eae16e59/attachment-0001.html>
