So, a line in Houses.tsv has a gtm:street column which links to a Item from (the previously imported) Streets.tsv, like a foreign key.
As far as I known, the only way to accomplish the links between lines and existing Items when importing Houses.tsv, is to pre-process this file. In the derivative file HousesID.tsv all values of gtm:street are looked up via the schema:identifier property and replaced with the Omeka ID of the Item. Then when I import HousesID.tsv I can specifify as Data Type for the gtm:street column Omeka resource (by ID).
Are there better / more efficient ways to accomplish this, without pre-processing? If not, could this be a feature of the CSV module? Maybe the Data Type Omeka resource (by schema:identifier).
You have the situation correct: for making internal resource values, linking one resource to another, CSV Import currently only offers the option of doing that linkage via the ID, so thereās no way to do them without going back and looking up the IDs to match.
The module contains all the functionality it needs to make these connect across by searching for metadata properties, and itās something thatās allowed when doing the similar task of looking up resources to update. Whatās needed is the interface to let the user choose from among the properties when selecting the Omeka resource data type.
My current thinking for something that would accomplish this without much upheaval is adding a new option, accessible under the āwrenchā sidebar. The Omeka resource type would just be renamed āOmeka resource,ā and then the new option would let you choose what property to use when looking up a matching resource: the ID as now, or any property.
I have a work-in-progress branch up for the solution I mentioned in my previous post: it adds a new option to the options sidebar allowing you to choose a property thatās used to look up the resource to link to when youāre using the āOmeka resourceā data type. So you can use IDs (still the default) or a match against any property you choose.
I donāt know if youāve installed CSV Import from a Git checkout before; if you havenāt, just a note that unlike most modules it has a Composer dependency so you need to run composer install in it when checking it out.
John, Iāve tested the resource-identifier-property branch, but run into issues.
The first one (missing āuseā) is easy, by the always empty $identifier I donāt quite understand, from the log: "" (dcterms:identifier) is not a valid resource..
