Discussion
Which protocols are often utilized by web scale discovery services to aggregate content ?
(i) Z39.50
(ii) OAI-PMH
(iii) SRU/W
(iv) FTP
Codes :
Answer: B
The answer is (i), (ii), (iii) are correct.
Web-scale discovery services gather and search metadata from many sources. Z39.50 is the long-standing protocol for searching library catalogues, SRU/SRW is its web-based successor, and OAI-PMH is the protocol for harvesting metadata from repositories.
FTP is a general file transfer protocol, not a library standard for searching or harvesting metadata, so the codes that include (iv) are wrong.
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