Solr indexing of date fields (Query about dc.date.issued_dt field)

[Kiran Dhakal]

Hi,

I am trying to use dc.date.issued in the bq field of dismax parser. But I cannot use it as it is multivalued. My plan was to make the field single valued, though I am yet to look at how to do that.

But, I stumbled upon the field dc.date.issued_dt. I saw that this field has been used in the configuration file as one of the sorting fields for dspace discovery search, which also required the field to be single valued. But I could not find any documentation describing about this field. My understanding from my limited observation is that this field is created by dspace as the dc.date.issued field can not be used to sort because of it being multivalued. And dspace creates the corresponding dc.date.*_dt for all dc.date.* fields.

And if that is correct, I can simply use the field dc.date.issued_dt in the bq field of dismax parser instead of making the field dc.date.issued single valued.

Could anyone please confirm or correct my understanding or point me to the documentation that I have missed but explains about this field.

Best regards,

Kiran

[Tim Donohue]

Hi Kiran,

I have to admit, we don't have "documentation" about how DSpace uses specific Solr fields.  So, this sort of question is extremely difficult for anyone to answer.  We generally don't recommend modifying DSpace's usage of Solr fields unless you've done a detailed analysis of the possible impacts (most users should really never need to touch Solr settings in DSpace).

So, honestly, I don't know the answer to your question here. I don't know what the impacts would be in modifying the "dc.date.issued_dt" field. You'd likely need to analyze where it is used in the code and then ensure your changes don't break behavior in DSpace.  Modifying anything in Solr needs to be done carefully, and it's not something we can easily help you with.

If someone else here is aware of the impacts of changing this field, hopefully they'll respond to this thread.

Tim

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From: dspac...@googlegroups.com <dspac...@googlegroups.com> on behalf of Kiran Dhakal <kirand...@gmail.com>
Sent: Friday, September 9, 2022 7:10 AM
To: DSpace Technical Support <dspac...@googlegroups.com>
Subject: [dspace-tech] Solr indexing of date fields (Query about dc.date.issued_dt field)

 

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