Page History

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Patron Driven Acquisition (PDA) and Demand-Driven Acquisition (DDA) : 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'.

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If the 899(a) field contains the following codes, it indicates an unpurchased ebook title (the vendor for PDA and DDA e-books is Casalini, Ebsco, and maybe others?): 

1. PDA_casaliniebkmu : this is an unpurchased e-book from Casalini (changed to CUL_casaliniebksmu once purchased)
2. ??
??
3. DDA_jstorebksmu
4. DDA_ebscohostebks 

If the 899(a) field contains the following codes, it indicates an unpurchased print book title (the vendor for PDA and DDA print books is Yankee)

1. (to be added, not yet known as Yankee titles have not yet been uploaded to our system)

Once a title is purchsed, the 'PDA' in the code is changed to 'CUL', so that PDA_casaliniebkmu will be 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. 

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