*** This version of Confluence is for testing only and contains a copy of content from June 29th 2026. No changes will be preserved. ***
Updated Information as of January 6, 2026
Patron Driven Acquisition (PDA): Records from two vendors (Casalini and Yankee) are uploaded into our system and made available for patron discovery, but remain unpurchased until a patron requests that CUL acquires the title. Then the title is 'purchased'.
As all the unpurchased titles are availabe in the catalog, title counts will include them, and we need to exclude them unless they have been purchased. For CUL, the purchase status is available in the MARC record in the 899 field, subfield 'a' .
If the 899(a) field contains
- PDA_casaliniebkmu : this is an unpurchased e-book from Casalini (changed to CUL_casaliniebksmu once purchased)
- ??
- ??
Note that we used to have a PDA contract with Proquest Coutts, but this has been discontinued and all the titles from that vendor have been supressed.
June 2024
For quite some time, CUL has been removing counts of its unpurchased PDA/DDA (Patron Driven Acquisition/Demand Driven Acquisition) titles for its annual data collection as requested by national definitions. These can be for physical or electronic titles, including media if any. However, CUL decided that it would not remove EBA (Evidence Based Acquisition) titles, as that model is based in part on subscription plans, and CUL does not remove e-resources purchased on a subscription basis, vs. on a permanent basis. (LTS’s Jesse K. and Weill’s Michael Wood agree on including EBA counts, and ACRL has since condoned it through its FAQs.) At least once a year, A&P consults with LTS staff to see which coding should be used to remove these counts.
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