Selective users update their holdings on OCLC through a process called batchloading. Each year these libraries export their online catalog database. All of the TBLC library databases are merged together into one file and sent to OCLC as a group file. TBLC facilitates this process and The MARC of Quality (TMQ) performs the processing and analysis of the files. Both adds and deletes are sent to OCLC so that holdings can be updated. The holdings information on WorldCat will then be updated so that it actually reflects what libraries currently hold. This increases the effectiveness of the ILL process.
Currently 37 libraries are batchloading their holdings to WorldCat with the assistance of TBLC as a group agent.
No-match
Approximately 95% of the records batchloaded to WorldCat will match a record already present in the WorldCat database. 5% do not match, so those library holdings are not represented in WorldCat after the initial database matching process. Some of these library records did not match because they represented unique items, and some did not match because of variations in cataloging practice.
In order to include as many of the libraries' holdings as possible in WorldCat, TBLC continues the batchloading process and attempts to resolve non-matching records. Non-matching records are manually searched in WorldCat, and holdings are set when a match is found. When no match is found, libraries are asked to send items to TBLC so that further information can be obtained from the item, or an original record can be created if necessary.
