FAST Changes

Log of updates to FAST Subject Headings

Recent FAST changes

DateNotesMARC Change File
2018-04-12 Usage statistics were updated. Download next full dump to obtain these. No changes to other aspects of the records. Download Page
2018-04-11 391 Records FAST Change File
2018-04-09 Usage statistics for Forms/Genre were updated. Download next full dump to obtain these. No changes to other aspects of the records. Download Page
2018-04-06 20 Records (form/genre) FAST Change File
2018-04-03 1629 Records FAST Change File
2018-03-23 28 Records (form/genre) FAST Change File
2018-03-13 434 Records FAST Change File
2018-03-07 209 Records FAST Change File
2018-03-06 443 Records (form/genre) FAST Change File
2018-03-05 7368 Records FAST Change File
2018-02-14 91 Records (form/genre) FAST Change File
2018-02-13 377 Records FAST Change File
2018-02-08 230 Records FAST Change File
2018-02-05 25 Records (form/genre) FAST Change File
2018-02-05 1719 Records FAST Change File
2018-01-12 440 Records FAST Change File
2018-01-08 38 Records (form/genre) FAST Change File
2018-01-05 175 Records FAST Change File
2018-01-03 38014 Records FAST Change File
2018-01-03 40444 Records FAST Change File
2017-12-14 7 Records (form/genre) FAST Change File
2017-12-14 385 Records FAST Change File
2017-12-12 214 Records FAST Change File
2017-12-08 51319 Records FAST Change File
2017-12-08 69956 Records FAST Change File
2017-11-28 77 Records FAST Change File
2017-11-13 3 Records (form/genre) FAST Change File
2017-11-13 631 Records FAST Change File
2017-11-07 382 Records FAST Change File
2017-11-03 1198 Records FAST Change File
2017-10-12 1392 Records FAST Change File
2017-10-10 338 Records FAST Change File
2017-10-09 25 Records (form/genre) FAST Change File
2017-10-05 954 Records FAST Change File
2017-09-19 124 Records FAST Change File
2017-09-18 519 Records FAST Change File
2017-09-11 1141 Records FAST Change File
2017-08-09 17 Records (form/genre) FAST Change File
2017-08-09 423 Records FAST Change File
2017-08-08 192 Records FAST Change File
2017-08-04 1077 Records FAST Change File
2017-07-12 404 Records FAST Change File
2017-07-10 206 Records FAST Change File
2017-07-10 59 Records (form/genre) FAST Change File
2017-06-06 23 Records (form/genre) FAST Change File
2017-07-07 1077 Records FAST Change File
2017-06-07 398 Records FAST Change File
2017-06-06 23 Records (form/genre) FAST Change File
2017-06-06 263 Records FAST Change File
2017-06-05 1244 Records FAST Change File
2017-05-26 450 Records FAST Change File
2017-05-11 459 Records FAST Change File
2017-05-10 25 Records (form/genre) FAST Change File
2017-05-10 176 Records FAST Change File
2017-05-05 1229 Records FAST Change File
2017-04-14 535 Records FAST Change File
2017-04-10 119 Records FAST Change File
2017-04-05 Usage statistics were updated. Download next full dump to obtain these. No changes to other aspects of the records. Download Page
2017-04-03 3731 Records FAST Change File
2017-03-31 40046 Records FAST Change File
2017-03-08 429 Records FAST Change File
2017-03-08 19 Records (form/genre) FAST Change File
2017-03-07 154 Records FAST Change File
2017-03-03 1120 Records FAST Change File
2017-02-09 340 Records FAST Change File
2017-02-08 168 Records FAST Change File
2017-02-06 49 Records (form/genre) FAST Change File
2017-02-06 1188 Records FAST Change File
2017-01-11 296 Records FAST Change File
2017-01-10 858 Records (form/genre) FAST Change File
2017-01-10 267 Records FAST Change File
2017-01-05 1036 Records FAST Change File

FAST Update Strategy and Logistics

The FAST Authority file is updated periodically and is made available by OCLC under the Open Data Commons Attribution License (ODC-By): http://www.oclc.org/research/activities/fast/odcby.htm. Periodically, the entire set of FAST files is made available for download at FAST Dataset Download These are updated about every 3 months.

To maintain and enhance FAST, updates to the FAST Authority file are more frequent. These more current updates to individual records are available though the searchFAST interface or through Linked Data on a per record basis if needed. The changes are summarized on this page.

Reasons for Updates:

Since FAST is derived from the Library of Congress (LC)Subject Headings and Names files, we update FAST periodically to follow changes to those files. Most Library of Congress changes are incorporated monthly, although some require further review and take a little longer. Also, FAST incorporates substantial linking information to other authority files, such as VIAF and Geonames, and these links are reviewed and updated periodically. Of course, routine maintenance, enhancements, and corrections also are reasons for updates.

Update Change file format

To create an easy reference for changes to the FAST authority file, the changes are recorded in a spreadsheet.

Change TypeFAST NumberCurrent HeadingFormer HeadingLinking EntryAdditonal Linking EntryNotes (this column is not in spreadsheet
New Headingfst######New Heading[blank]LCSH/NACO headingLCSH/NACO heading (as needed)
Modified Headingfst######Modified HeadingFormer HeadingLCSH/NACO headingLCSH/NACO heading (as needed)
Other Changesfst######Current Heading[blank]LCSH/NACO headingLCSH/NACO heading (as needed)The main heading is unchanged for this record. 4xx, 5xx or 7xx or other fields may have changed.
Deprecatedfst######[blank]Former HeadingFAST replacement heading  7XX links are for the replacement FAST headings. Links to LCSH/NACO are less interesting now.
Splitfst######[blank]Former HeadingFAST replacement headingFAST replacement heading (as needed)7XX links are for the replacement FAST headings. Links to LCSH/NACO are less interesting now.
Obsoletefst######[blank]Former HeadingLCSH/NACO headingLCSH/NACO heading (as needed)The referenced LCSH/NACO headings may provide information about why these headings were made obsolete or deleted with no replacement headings specified.

Date and Time of Last Transaction

In MARC, the 005 field records the date and time of the last transaction for a record. We always follow this practice for any substantial change to the record, such as the authorized or see also headings. However, since FAST incorporates more 'living' information, such as the annual count of how frequently the heading is found in WorldCat, resetting the time stamp would mask the date of the last substantive change. Examples of changes that don't result in Transaction date changes are: validation and replacement of VIAF or other links, updates to usage statistics, and minor clerical updates that touch a large number of records. A MARC Change File will be made available for any change that results in a Date and Time of Last Transaction change.

FAST Record Numbering

FAST strives to associate a FAST number with a concept. If the string representing the concept changes, the FAST number will be kept the same. This follows LC practice, and generally a LC control number (LCCN) will always be associated with the same FAST number

When two concepts are merged, the now non-preferred heading is deprecated in favor of an existing concept. Deprecated records contain links to the replacement records, and the new records have a reference to the old form of the heading. These are clearly indentified in the MARC version for the records, and appropriate mappings are made of this information to the RDF versions.

If a concept is split into two or more concepts, new numbers are assigned to the new concepts and the original FAST number will be deprecated. For example, "Nurses and Nursing" was split into two concepts, "Nurses" and "Nursing", and two new numbers are assigned.

At first FAST attempted to control both the FAST number and heading string as a pair. If an authorized heading string changed, a new FAST number was assigned, and the heading string was not reused. This became impractical, so the practice was discontinued. Many deprecated records are still in FAST that record the complete earlier form of the record.