Record Management Services
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Record Management Services (RMS) are procedures in the VMS, RSTS/E, RT-11 and RSX-11M operating systems that programs may call to process files and records within files.[1][2] Its file formats and procedures are similar to of those in some IBM access methodsTemplate:Efn for several of its mainframe computer operating systemsTemplate:Efn and by other vendors for file and record management. VMS RMS is an integral part of the system software; its procedures run in executive mode.[3] (RMS was not initially integrated into RT-11 and RSTS/E, but was available as an added charge "layered product". It was later added to RSTS/E and was a part of its standard documentation set.)
RMS supports four record access methods:
- Sequential Access
- Relative Record Number Access
- Record File Address Access
- Indexed Access
RMS supports four record formats:
- Fixed length
- Variable length
- Variable record length with fixed-length control blocks
- Stream files (records separated by termination characters)
- STREAM: Records terminated by CRLF
- STREAM_CR: Records terminated by CR
- STREAM_LF: Records terminated by LF
Digital provided the File Definition Language (FDL) which could be used to define the structure of an RMS file.[4]
Notes
References
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- ↑ Script error: No such module "citation/CS1".
- ↑ <templatestyles src="Citation/styles.css"/>This article is based on material taken from Record+Management+Services at the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.
- ↑ Script error: No such module "citation/CS1".Script error: No such module "Unsubst".
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External links
- Guide to OpenVMS File Applications Script error: No such module "webarchive".
- OpenVMS Record Management Services Reference Manual Script error: No such module "webarchive".
- Free BASIC demo programs showing how to use RMS