Statistical Summary
Contents
Statistical Summary
A MARS 2.0 Statistical Summary is generated for every project that involves processing bibliographic records for authority control. The Statistical Summary includes both high-level and detailed statistical information about the records processed. It also includes the number of times selected actions were taken and the number of headings that met certain criteria.
Five Sections
The statistical information is divided into five sections:
Section 1: Record Overview
A high-level view of the processed files. This section includes the number of bibliographic records by type (books, serials, etc.) and how many records were changed during MARS 2.0 processing.
Section 2: Field Distribution
A statistical analysis of the distribution of fields (by tag) within the bibliographic file. Included are how many records had none, one, or two instances of each field, and how many fields changed (by tag). Changes listed in this section correspond with Step 2 of the Planning Guide.
Section 3: Authority Control
Provides match-rate statistics for fields under authority control examined during Step 3 of the Planning Guide.
Section 4: Authority Control Processing
Counts of specific changes made, and conditions found, during Step 3 of the Planning Guide.
Section 5: MARC Update Processing
Counts of specific changes made, and conditions found, during Step 2 of the Planning Guide.
Sections 4 and 5 also serve as a list of the reports available. Those reports marked with an asterisk (following the report number) are available for all MARS 2.0 authority control projects at no additional cost.
Section 1 : Record Overview
The first section lists a breakdown of the bibliographic formats processed. These are broken down according to the value in the bibliographic record's leader, bytes 6 and 7. The Record Format Table (see below) lets you know what our system considers a Book or a Computer File, etc.
| Format | # of Records | % of File | Changed | % Changed |
| Books (BK) | 536 | 98.9 | 519 | 95.8 |
| Continuing Resources (CR) | 2 | 0.4 | 2 | 0.4 |
| Mixed Materials (MX) | 0 | 0.0 | 0 | 0.0 |
| Music (MU) | 2 | 0.4 | 1 | 0.2 |
| Maps (MP) | 0 | 0.0 | 0 | 0.0 |
| Sound recording (MU) | 0 | 0.0 | 0 | 0.0 |
| Visual Materials (VM) | 2 | 0.4 | 2 | 0.4 |
| Computer Files (CF) | 0 | 0.0 | 0 | 0.0 |
| Other | 0 | 0.0 | 0 | 0.0 |
| Totals | 542 | 100.0 | 524 | 96.7 |
The Number of Records column contains the different formats that your bibliographic file comprises. The next column to the right, Percent of File directly relates to the Number of Records.
Record Format Table
| Type | LDR 06 | LDR 07 |
| BK | t or a | a or c or d or m |
| CF | m | |
| MP | e or f | |
| MU | c or d or i or j | |
| CR | a | b or i or j |
| VM | g or k or o or r | |
| MP | p |
