In order to deliver useful data to the user, some classes of records should be excluded from swissbib while importing. This has no influence on the local systems that have in contrast to swissbib to divide their focus between librarians and library users.
A record is useful for a library user if it
- contains valuable bibliographic information that is as controlled as possible
- leads to items or electronic resources that can by tendency be accessed or loaned
- leads to records with accessible items or resources
General exclusion criteria
The rules for exclusion are guided by the principle that a user should not find records that
- have no items or resources attached
- are not linkable to records with item or holding information
- are only of use for libraries' internal administration
- contain no usable title information
The general exclusion workflow combines different steps to check if a record:
- does contain all necessary elements
- needs to be excluded because it
- is not fit for publishing to the public
- does not meet bibliographical requirements
The latter criteria are modularized and can be individually adapted for the different library networks.
Record types to be excluded
These records normally are basic, uncontrolled and not linked to items directly useful to the user. A second and no less important factor is that these records hinder the deduplication process. Although some of them are of good quality there is no chance of determine this accurately. They are excluded until they are completed and the attached items are available.
If a library is heavily dependent on acquisition records in swissbib, those records are imported but are excluded from the deduplication process.
These records are generally used as auxiliary records for requesting uncatalogued items. Some of them contain basic information of usable quality but most of them are of no use as they neither contain complete author nor title information. They are of no use for the user while searching and cannot be deduplicated by software.
If a library is heavily dependent on them and their quality is minimally acceptable it has to be checked, whether these records could be included in swissbib. At the moment this is not the case as most bigger libraries start or run recataloguing projects.
Records which do not match bibliographic requirements
These records cannot be deduplicated and are therefore excluded. If they exist in larger quantities in a library network other solutions have to be found.
Records are excluded if
- the title description (245) is missing
- the entry fields (100/110/111/700/711/700/711) contain wild-card characters instead of names
- the control field 008 is corrupt or missing
Some of the bibliographic databases contain (mostly) analytical records that are neither linked (or linkable) to other records nor have an item or URL attached. These records are of no use for the user as he or she can neither find out where to look for a holding library nor has any item giving him/her additional information.
Records that are for internal use only
Records or items that are only there to tell that an item is lost, removed from the collection (five years ago), cancelled, or else will not be included in swissbib.
Furthermore a library can choose not to include records in swissbib by marking them locally with a code ("noswissbib") or by requesting the exclusion of records matching specific criteria, which can be implemented by swissbib.