fix ISO parsing to support gmd:distributorTransferOptions

[tomkralidis]

cc @pacioos @rsignell-usgs

ncISO generated metadata stores linkes in gmd:distributorTransferOptions, not gmd:transferOptions. Turns out OWSLib already supports both, so extend pycsw.metadata to additionally scan/store md.distribution.distributor.online links.

[rsignell-usgs]

So does this impact our ability to discover service endpoints at data.gov, for datasets where the ISO metadata was was originally generated by ncISO?

[tomkralidis]

In the case where elementsetname != full and outputschema != http://www.isotc211.org/2005/gmd, yes, in a positive way, where there will be more links available.

Having said this.this will not solve the links types issue, which is a whole other issue.

[pacioos]

Wanted to point out that ncISO stores one or more links not only in
gmd:distributorTransferOptions, but also in srv:SV_ServiceIdentification.
Both contain critical endpoints.
Thanks,
John

On Wed, Apr 16, 2014 at 7:58 AM, Tom Kralidis notifications@github.comwrote:

In the case where elementsetname != full and outputschema !=
http://www.isotc211.org/2005/gmd, yes, in a positive way, where there
will be more links available.

Having said this.this will not solve the links types issue, which is a
whole other issue.

Reply to this email directly or view it on GitHubhttps://github.com//issues/238#issuecomment-40631078
.

[tomkralidis]

thanks @pacioos. So from srv:SV_ServiceIdentification, I will scan/add all the srv:containsOperations/srv:SV_OperationMetadata/srv:connectPoint/gmd:CI_OnlineResource links. I think that's all of them now?

[pacioos]

Correct. Thank you!

On Wed, Apr 16, 2014 at 1:56 PM, Tom Kralidis notifications@github.comwrote:

thanks @pacioos https://github.com/pacioos. So from
srv:SV_ServiceIdentification, I will scan/add all the
srv:containsOperations/srv:SV_OperationMetadata/srv:connectPoint/gmd:CI_OnlineResourcelinks. I think that's all of them now?

Reply to this email directly or view it on GitHubhttps://github.com//issues/238#issuecomment-40666697
.

[tomkralidis]

Fixed in master and 1.8 branch.

[amilan17]

Please be aware that distribution links in the ISO metadata can be available from two different Xpaths in the distribution section of ISO.

NcISO always outputs the links at this Xpath:
gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorTransferOptions/gmd:MD_DigitalTransferOptions/gmd:onLine/gmd:CI_OnlineResource

But you may stumble across ISO records that also have links at this Xpath:
gmd:distributionInfo/gmd:MD_Distribution/gmd:transferOptions/gmd:MD_DigitalTransferOptions/gmd:onLine/gmd:CI_OnlineResource

[tomkralidis]

@amilan17 thanks for the heads up. I think this is covered in https://github.com/tomkralidis/pycsw/blob/master/pycsw/metadata.py#L953-L984

[amilan17]

Yes it does!