Hack-a-thon Session - IVOA Apr 2022 Interoperability Meeting

Thursday 28 April 2022 - 13:30 & 15:00 UTC

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Where: Gather Town

The hack-a-thon sessions, pitched at Interop's opening and reported/contributed on this collaborative pad, will take place on the Gather Town online space (kindly offered and set up by CNRS/Obs.Strasbourg and EU H2020 ESCAPE project).

The schedule setup will see two main time slots (back to back) but you can always organise in groups and use other time slots (Gather town is always open).

Agenda

• Welcome and short intro
• Pitch ideas (1 min each)
• Group ourselves and get to work
• Not much time, so pick smallish projects, and if you like:
  • prepare ahead of time (at least have a look around gather.town)
  • work during break(s)
  • arrange with collaborators to continue after the Interop

Reporting hack-a-thon work/discussion.

You are invited to present a 2 minute single slide summary of your hack project at the closing plenary. It great to hear about what worked and what didn't, and what might come next.

Topics to be included in this hands-on hack-a-thon are welcome and collected here (collaborative pad). However, single hack-a-thon topics are encouraged to keep notes of what they did in separate collabroative pads (e.g. using yopad EtherPads or similar) and then attach them here.

If you have doubts on how to do that: refer to topic reference people or interop_helpdesk [at] ivoa [dot] net.

Example Topic Report

A short description (maybe taken from the topics pad)

• Use %ATTACHURL% to link to the attached report from the hack-a-thon

Running List of Topic Reports

Define pyvo API for accessing VODML information in DAL results

(Laurent Michel/Tom Donaldson)
Work is progressing on instantiating Astropy objects directly from VOTables annotated with VODML. PyVO seems like the best place to support that work. How should the API look?

• See the wiki for (VO Model Annotation Syntax (VOMAS or MIVOT))
• A Github Wiki page has been open to detail the issue
• Users can put their requirements/ideas on this dedicated page
• A session note pad is also available

ProposalDM Hacking

(Paul Harrison)

The ProposalDM is being developed at https://github.com/ivoa/ProposalDM. This session is intended for people who want to contribute to the further development of the model. Topics for discussion can include (but are not limited to);

ExecutionPlanner Hacking

-- DaveMorris

Where next for the ExecutionPlanner?

• Is there enough to make a start on a draft standard?
• Is anyone interested in developing some prototypes?

• The JSON schema files
• Some JSON examples
• What works / doesn't work?
• What is missing ?

TAP container with RegTAP support

(Marco Molinaro, Grégory Mantelet, Markus Demleitner)

Two solutions listed in the abstract: VOLLT/TAPLib and DACHS.

VOLLT

In preparation of this topic, here is a simple Docker-Compose solution working with VOLLT/TAPLib and setting up a RegTAP service with an empty PostgreSQL database (apart from the schemas TAP_SCHEMA and rr, and the required User Defined Functions): regtap_20220427.tar.gz

To use it:

1. Unzip,
2. Go into the directory containing the docker-compose.yml,
3. Run `docker-compose up`
4. Visit the URL http://localhost:8081/regtap.

DACHS

As said above the other solution is to use DACHS:

apt install gavodachs2-server; cd /var/gavo/inputs; svn checkout http://svn.ari.uni-heidelberg.de/svn/gavo/hdinputs/rr/; dachs imp rr/q create

Hack-a-thon goals

• technical solution to use and/or improve (e.g. docker, vollt, dachs, ...)
• where and how to get the RegTAP content to publish (e.g. harvesting, adding custom registry entries, ...)
• ...

Simple Cone Search server bundle

Idea to implement a small package to provide a ConeSearch service to be re-used by newcomers to test curation and deployment. Start out of Simple Cone Search Creator library from Thomas Boch.

Discussion and first testing was done. Notes were taken (and attached here). Activity will be brought on after the Interop.

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