SIF Meeting, 17-May-2013
Convened: 13:30 - 15:00 UTC
Attending: Steve Browdy (SB), David Arctur (DA), Bart De Lathouwer (BD), Espen Volden (EV, Geosec)
Recording: DA
Agenda and Discussion
- Mime Types for the SIR and CSR changes (quick review)
- Needed for helper apps - please fill in! (see google spreadsheet here)
- Bart De Lathouwer will work on the OGC types
- JM suggests we should use mime types for formats, but use the DAB or Context doc URI for service types (are these the same, eg, for WMS?)
- I do not like to invent a "new" MIMEType for a service since MIMETypes are intended for formats only. I do not like the idea of application/x-wms because WMS has more that one request and several MIMEtypes associated with them. What we need is something that transmits the following message: "I look for a helper application that suports WMS"; how can we do this for services:
- OWS context has its own identifies for services. For WMS it is: http://www.opengis.net/spec/owc-atom/1.0/req/wms. It might be not adequate but is better than inventing a new thing.
- The DAB uses another "family" of identifiers for services in the element "protocol" of a ISO 19119 record describing a service. In the case of WMS it uses "OGC:WMS-1.1.1-http-get-map". I like this idea because is already used in the GCI.
- Please don't invent new URI types
- Discussion of Data Citation as an SIR entry (with Hans-Peter Plag)
- Hans-Peter not on the call
- see: http://www.gstss.org/library/GEOSS_Data_Citation_Guidelines_V2.0.pdf
- SB: proposes to put this document in the Best Practices Wiki, rather than in the SIR. This does not represent a community-adopted standard or special arrangement.
- DA, JM agree; ACTION : SB will put this in the BP Wiki and ask Hans-Peter to suggest a future meeting time if further discussion is needed.
- UNEP Live update (with Mick Wilson)
- Email update from MW: New activity toward interoperation of UNEP Live with MEA Knowledge Domains (controlled vocabularies), with donor funds from Eye on Earth. So UNEP-Live will contribute to AIP-6.
- BD: will this show up in the showcase demos?
- SB: has submitted this already, for UNEP Live to interoperate with the DAB.
- SIF Operating Procedures review (see Feb 8 SIF telecon notes)
- SB: wishes to submit to IIB by June; can deal with this via email before May 31 (next SIF meeting)
- OWS Context Standard in GEOSS (BPW/Tutorials)
- Based on discussion around Context doc's re: mime types for helper apps: guidelines for Context docs would be good to include in BP Wiki
- Hervé Caumont suggested the SIF investigate & understand the usefulness of OWS Context for GEOSS
- DA: OWS Context could serve like a "shopping cart" for a GEOSS user during search & discovery
- 2013 interoperability topics to consider (results in two whitepapers)
- Broker “knowledge” of resource metadata and fixing "numbers" issues
- need to understand if or how Broker can do secondary searches (finds a catalog resource during a search, and propogates search to that catalog)
- "numbers" issue: how many datasets are accessible via GEOSS? where does the figure "millions of datasets" come from? can't easily discover millions of datasets from routine search.
- DA: CEOS Water Portal claims "millions of datasets" alone
- SB: ACTION: will ask Stefano or Mattia to join SIF call and tell us how they get "millions of datasets"
- JM: see DAB client here: http://www.eurogeoss-broker.eu/ -- open search result (all records) gets about 651k datasets; all GEOSS Data Core results 363282 datasets. Note that CEOS Water Portal does not appear as one of the searched catalogs.
- JM: found reference: An active crawler for discovering geospatial Web services and their distribution pattern – A case study of OGC Web Map Service http://dx.doi.org/10.1080/13658810903514172 (IJGIS download for fee)
- Registration alternatives: registering in CSR vs. registering in DAB
- need to reaffirm that the registration process for GEOSS (GEO Portal) always involves the CSR (geossregistries.info). Datasets are being registered in broker but not in CSR. This is a usability and CSR workflow issue; should SIF work on this?
- BD: we should add this to IIB agenda; SB: SIF could stress importance of following correct registration process, or could investigate alternatives to current registration process and suggest improvement.
- SB: ACTION : will write up summary to SIF list about alternatives
- Investigation of OWS Context for use in GEOSS (worth pursuing; see notes above for today's discussion)
- Any other business
- Work Plan Symposium (IIB Meetings): role of SIF, comments on new Terms of Reference (next telecon)
Next meeting date: 31 May 2013
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DavidArctur - 14 May 2013