Support ISO metadata harvesting

[mandsch]

Enable pycsw to support CSW harvesting of ISO metadata records, by using gmd:MD_Metadata typename in the getrecords request (in addition to csw:Record).

[tomkralidis]

Initial discussion: http://osgeo-org.1560.x6.nabble.com/CSW-Harvesting-using-APISO-possible-td5104886.html

[tomkralidis]

I think the typenames parameter, in which gmd:MD_Metadata is required for APISO, might be a moot point for the CSW harvesting another CSW use case, unless your harvesting involves filters. pycsw does CSW harvesting against all records of another CSW and doesn't apply filters. Would this be valuable or is harvesting all CSW records good for now?

Thinking more, I guess the question becomes whether we:

1./ check if the target CSW supports ISO typename and outputschema (they should be mutually exclusive, though). If it does, then harvest the CSW's records as ISO. If not, then harvest the CSW's records as Dublin Core

2./ Set manager.csw_harvest_type=apiso and do this without checking

Other options?

Option makes this easier for the user, but makes the assumption that ISO metadata is preferred. Still option sounds easier on the user. @mandsch thoughts/comments?

[mandsch]

Tom, thanks for taking this up here. My use case is driven from INSPIRE requirements.
I think the important bit for the use in the INSPIRE area is the support for harvesting other CSWs that primarily support ISO outputschema. So for this use-case the option sounds easier, but I would prefer solution 1, that would examine the capabilities, checks for the outputschema and uses the preferred typename of the remote CSW (assuming that the first in the list of typenames is the default one).

[tomkralidis]

@mandsch almost there; can you provide a stable CSW server to test this against?

[smrgeoinfo]

Tom-- you can try http://catalog.usgin.org/geoportal/csw/discovery?request=GetCapabilities&service=CSW
It provides USGIN-profile ISO 19139 xml, similar to INSPIRE profile. It's an ESRI Geoportal CSW.

I'm eager to see this working as well, so we can plug it into CKAN.

[mandsch]

Tom, here's the URL of our Geonetwork catalogue: http://gdk.gdi-de.org/gdi-de/srv/eng/csw?SERVICE=CSW&VERSION=2.0.2&REQUEST=GetCapabilities
(sorry, for the delay).

[jachym]

I think, this is also related to my issue. According to how I understand the problem, czech metadata inspire portal prefers ISO as well: http://geoportal.gov.cz/php/micka/csw/index.php