The adjustment of adaption descriptive cataloging bibliographical records of Persian books in the National Library of Iran according to AACR2 during 2005-2009

This study compared the descriptive cataloging of Persian books of the National Library of Iran in the years 2005-2009 and has been conducted to determine compliance with AACR2. Comparative survey method and content analysis used in this study. Content of the bibliographic information in National bibliography CD was comparison with books and data collected by the check list. The population of investigation includes 201144 bibliographic records that the sample includes 1902 bibliographic records. Persian books descriptive cataloging, a total of 82% of cases has, correct operation, and 18% of cases, not performed correctly. There the Imprint area was highest accuracy (96/3%), lowest error (3/7%) and Note area was lowest percentage accuracy (59/85%) and highest percentage of errors (40/15%). However, χ2 test – counting 90% accuracy and 10% error- indicating the point that the degree of accuracy in the areas of cataloging, there are significant difference. So that in Note area, significantly is less than standard and in Imprint area is higher than the standard. In other areas accuracy quality is according to the Anglo-American rules. According to the statistical calculations, there is no significant difference in error rates between different years. Accordingly, it can be concluded that descriptive cataloging of Persian book in National library, the relative performance of the ideal has been.