OhioLINK Enc Lvl & Priority

OhioLINK Encoding Level and Institutional Priority Order to Determine the Bibliographic Record Displayed

January 2008

Master Record

The INN-Reach Catalog is designed so that one bibliographic record from one of the contributing sites serves as the INN-Reach Catalog's "master" bibliographic record. The site that contributes that record is considered the "owner" of the record. Holdings information from other sites that have the same title display with the master bibliographic record, including local Call Numbers, Shelving Locations, and Circulation Status.

The master bibliographic record represents one of the contributed records from one of the participating sites. As records are transmitted to the INN-Reach Catalog from the Local Servers, the INN-Reach Central Server matches them with other records already in the database. When two or more copies of the same record are sent to the INN-Reach Catalog, the system determines which bibliographic record to use as the master bibliographic record.

Master Record Priority

The determination of a master record is based upon the Encoding Level (MARC Leader Byte 17) and the Library Load Priority Table as follows:

If the incoming bibliographic record has a higher Encoding Level than the existing record, the incoming record replaces the existing record.
If the incoming record has a lower Encoding Level, the existing record is retained, and a LOCAL PAC field (945) for the incoming library record is added to the existing record.
If the Encoding Level is the same, or in the same Encoding Group (described below), the INN-Reach Central Server consults the Library Load Priority Table to determine if the incoming record should replace the existing record. If the Library Load Priority Level of the incoming record is higher, the existing record is replaced (overlaid). If the Priority Level of the incoming library is lower, a LOCAL PAC field (945) is added to the master bibliographic record for the site. If the Priority Levels are the same, the record entered on the system first is retained as the master bibliographic record, and a LOCAL PAC field for the later entry is added to the master bibliographic record.

Each site is assigned a load priority number used only for determining which of two records with equal Encoding Levels should be loaded as the master bibliographic record. Libraries may each have a distinct Priority Number, may all have the same Priority Number, or some libraries may be grouped under the same Priority Number.

Encoding Levels are grouped, with some Levels considered equal. For example, Encoding Levels 5 (partial level) and 7 (minimal level) have equal load value in the table below. The following Encoding Levels and Encoding Groups encompass both standard codes found in US MARC and codes defined by OCLC. The list begins with the highest level first, i.e., group 10.

--InnReach Documentation, p. 103341

INN-Reach Priority Groups

INN-Reach Encoding Group	Encoding Level	Meaning
10	blank	Full level
9	I	Full level input by an OCLC library
9	4	Core level
8	1	Full level, material not examined
7	L	Non-LC & non-NLM loaded from tape
6	K	Less than full input by an OCLC library
6	J	Record deleted by LC from MARC file
6	2	Less than full level
6	M	Less than full level, tape loaded
5	8	CIP prepublication data
4	5	Partial level
4	7	Minimal level
3	E	System-identified error in LC MARC record
3	W	Warning possible error in LC MARC record
3	3	Abbreviated level
2	U Z	Unknown Not applicable

Institutional Priority Order (January 2008)

Priority 1: The libraries in this priority group maintain authority control on both LC and MeSH headings. In the interest of keeping as many access points as possible, their records are preferred over those of other libraries, if the encoding level group is the same.

Priority 1 libraries are:

Case Western Reserve University
Ohio State University
Ohio University
University of Cincinnati
Wright State University.

Priority 2. The libraries in the second priority group use OCLC for ongoing cataloging. OCLC number will still be the preferred matching point, even when the ISBN/title matching algorithm is also used at the central site. Every OhioLINK library that uses OCLC for most of its cataloging is a Priority 2 library. This group includes every library not named as a Priority 1, 3, or 4 library.

Priority 3: Center for Research Libraries records. (Not CRL records loaded at local sites and contributed from local sites.)

Priority 4: Because their ongoing cataloging will lack OCLC numbers, and because CRL records do have OCLC numbers, records from libraries that do not use OCLC will be at the lowest priority, below CRL records.

Priority 4 libraries are:

Edison State Community College
Hocking College
Jefferson Technical College
Lorain County Community College
Terra Community College
Washington State Community College.