How to list more sets

[Jonas K]

Hi, 

I would like to ask you about a problem I have encoutered, maybe someone would know the way. 

Desired outcome:
To make possible for harvesters to harvest all records excluding those which are in specific set. 

In different words:

Is it possible to merge only specific sets so the records from these sets will be in one list?

First I was thinking about this solution (but this is not working):
URL: ..../oai?verb=ListRecords&metadataPrefix=oai_dc&set=map&set=graphic

Then I was thinking if it is possible to create one set which contains records from set=map and set=graphic --> I found there can be some hierachy to be created according to http://www.openarchives.org/OAI/2.0/guidelines-repository.htm#Sets-Hierarchy

My question is how? Documentation seems to me very brief for me as a person who never worked with oaipmh so much.

 

Can I do just something like this? 

<set>

            <setSpec>combined</setSpec>

            <setName>Own set</setName>

            <setDescription>Combination of records of graphic set and map set</setDescription>

</set>

<set>

            <setSpec>combined:graphic</setSpec>

            <setName>list of graphics</setName>

            <setDescription>......</setDescription>

</set>

<set>

            <setSpec>combined:map</setSpec>

            <setName>list of maps</setName>

            <setDescription>......</setDescription>

</set>

And with these LIstSets would it be possible to:

a) harvest only maps (set=combined:map)

b) harvest only graphic (set=combined:graphic)

c) harvest both together (set=combined)

Or is there some other ways and solution of this my problem?

Thank you so much for your help. This is something very new for me and I would be very glad to all of you for help. 

[Simeon Warner]

Hi Jonas,

The set parameter is not repeatable (so set=map&set=graphic isn't expected to work) and I'm afraid that there isn't a way to harvest the contents of multiple sets or intersections of set unless those are explicit in the set hierarchy. I believe the structure you propose:

> And with these LIstSets would it be possible to:

> a) harvest only maps (set=combined:map)

> b) harvest only graphic (set=combined:graphic)

> c) harvest both together (set=combined)

Is the way to do it. One doesn't necessarily need the `combined` set if that would be the same as everything (no set parameter specified).

Cheers,

Simeon