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Fourth CAP meeting
The fourth CAP meeting took place on Thursday, 17th of September 2015, 3-5PM CET
Notes from the meeting:
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Patricia and Sünje reported on the progress on the JSON metadata schema specifications. Pamfilos implemented a first version (which will be revised based on testing during the next months). DASPOS organized a HEP ontology boot camp at the University of Notre Dame in May. A first draft for a common HEP ontology was developed so far covering the detector final state and data processing workflows (with input from all LHC collaborations). They are now being tested with real data (e.g. the latest CMS Open Data release). Part of the results were submitted to and will be presented at the Workshop on Ontology and Semantic Web Patterns in October 2015 (http://ontologydesignpatterns.org/wiki/WOP:2015).
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Tibor and Pamfilos showed the latest progress on the development site. Major changes in the backend happened, e.g. the system now runs entirely through Docker, so that data submitted to the current CAP version are already being stored and CERN OAuth/SSO is used for authentication and permission/access setting (through e-group membership). The CMS Statistics Questionnaire is done and so is the first JSON based submission form (which is now being tested and revised).
Pamfilos showed prototype of JSON-schema-based submission for analysis preservation and how it can connect to collaboration databases exemplary through the connection between CAP and DAS (CMS). Discussion underlined the need for an additional layer for easier user guidance so that using CAP is as easy as possible, for example via automated pre-filling of the form by grabbing analysis source code when possible (Andreas Pfeiffer). It should also be mentioned that different options are available: from grabbing code from a GitHub repo to a very detailed manual entry via the JSON forms. Users will need guidance here. Furthermore, the discussion highlights that the JSON forms should be flexible and available 'on demand', so users can pick and combine forms and subforms to represent their analysis. Tibor confirms that the schema composition is possible (e.g.cap-common-file-0.7.jsonorcap-cms-physics-objects-0.3.json, etc). Kyle mentioned usefulness of composing submission sub-schemas with already submitted data. Also, it would be good to share JSON schemas on GitHub more publicly, so that others can revise and comment.