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--- plp:crosschecks:xtitl [2011/03/07 14:18]
tmqinc
+++ plp:crosschecks:xtitl [2013/04/27 09:09] (current)
@@ Line 1: / Line 1: @@
+**PLP Crosschecks--XTITL**
+====== X245H Crosscheck ======
+The purpose of this crosscheck is to prevent records from matching when the items have different titles.
+===== Data extraction =====
+This crosscheck follows the same data extraction rules as for the [[plp:primary_keys:primary_title|title as a primary key]], with the following exceptions:
+  * subfield $h (GMD) is ignored
+  * each retrieved title is truncated to 40 characters
+===== Normalization =====
+  * [[plp:normalization|standard normalization]] is applied
+===== Processing rules =====
+Results retrieved from the 245 field of each record are compared first; if that fails, the comparison is expanded to include all alternate titles (246) in each record.
+  * Must match in both records. A missing title fails the match.
+===== Note =====
+Important: unlike the primary key query for TITLE, the title crosscheck does not consider the GMD, so be sure to enable X245H.

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