M

See Also

• See the Wikipedia article on MUMPS
• See the page on this site: Introduction To Programming VistA with MUMPS
• See the page on this site:MUMPS Code Examples or the site: MUMPS by Example by Ed de Moel
• see https://learnxinyminutes.com/docs/m/ archived here as Learn M In Minutes
• The ISO/IEC 11756:1999 Informational parts of the M standard: https://www.iso.org/obp/ui/#iso:std:iso-iec:11756:ed-2:v1:en

There are several implementations of MUMPS:

• M/Cache Cache from InterSystems Corporation (proprietary,commercial)
• M/DSM-11 from Digital Equipment on PDP-11
• M/FreeM from John Willis
• M/GT.M GT.M from Fidelity (open source, commercial)
• M/IRIS IRIS from InterSystems Corporation (proprietary, commercial)
• M/ISM-11 from InterSystems on PDP-11
• M/MVX from InterSystems on VAX/VMS
• M/RSM Reference Standard M from David Wicksell
• M/VAXDSM from Digital Equipment Corporation (DEC) on VAX/VMS
• M/YottaDB YottaDB from YottaDB.com (open source, commercial)

Definition of the Language

Any program written in M (MUMPS) that is stated as being written in Standard M must conform to the ANSI X11.1 or ISO standard for the language.

Any implementation of M (MUMPS) that is to be qualified as Standard M must conform to the same standard.

Templates

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M/ABLOCK M/ASK M/ASSIGN M/ASTART M/ASTOP M/AUNBLOCK M/BREAK M/CLOSE M/Command ?? M/Command A M/Command AB M/Command ABLOCK M/Command ASK M/Command ASSIGN M/Command ASTART M/Command ASTOP M/Command AUNBLOCK M/Command B M/Command BREAK M/Command C M/Command CLOSE M/Command D M/Command DO M/Command E M/Command ELSE M/Command ESTA M/Command ESTART M/Command ESTO M/Command ESTOP M/Command ETRI M/Command ETRIGGER M/Command F M/Command FOR M/Command G M/Command GOTO M/Command H M/Command HALT M/Command HANG M/Command I M/Command IF M/Command J M/Command JOB M/Command K M/Command KILL M/Command L M/Command LOCK M/Command M M/Command MERGE M/Command N M/Command NEW M/Command O M/Command OPEN M/Command P M/Command Q M/Command QUIT M/Command R M/Command READ M/Command S M/Command T M/Command U M/Command V M/Command VIEW M/Command W M/Command WRITE M/Command X M/Command XECUTE M/Command Y M/Command Z M/Commands M/CurrentCmd M/DO M/DSM-11 M/DSM-11/20200521 M/DSM-11/20200522 M/ELSE M/ESTART M/ESTOP M/ETRIGGER M/Error List M/FOR M/FormerCmd M/GOTO M/HALT M/HANG M/IF M/ISM-11 M/IsPrefixCmd M/J M/JOB M/Job M/K M/KILL M/LOCK M/LetterIsCmd M/MERGE M/MUMPS-11+ M/MUMPS-15 M/MUMPS-4b M/MWAPI impl M/M Language Elements M/Mcmd M/Mcmdabbr M/Mmeta M/Mumps Language Issues M/NotImpl M/OPEN M/QUIT M/READ M/SET M/TRESTART M/TROLLBACK M/TSTART M/VAX M/VIEW M/XECUTE M/j

Template: MUMPS

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M/ABLOCK M/ASK M/ASSIGN M/ASTART M/ASTOP M/AUNBLOCK M/BREAK M/CLOSE M/Command ?? M/Command A M/Command AB M/Command ABLOCK M/Command ASK M/Command ASSIGN M/Command ASTART M/Command ASTOP M/Command AUNBLOCK M/Command B M/Command BREAK M/Command C M/Command CLOSE M/Command D M/Command DO M/Command E M/Command ELSE M/Command ESTA M/Command ESTART M/Command ESTO M/Command ESTOP M/Command ETRI M/Command ETRIGGER M/Command F M/Command FOR M/Command G M/Command GOTO M/Command H M/Command HALT M/Command HANG M/Command I M/Command IF M/Command J M/Command JOB M/Command K M/Command KILL M/Command L M/Command LOCK M/Command M M/Command MERGE M/Command N M/Command NEW M/Command O M/Command OPEN M/Command P M/Command Q M/Command QUIT M/Command R M/Command READ M/Command S M/Command T M/Command U M/Command V M/Command VIEW M/Command W M/Command WRITE M/Command X M/Command XECUTE M/Command Y M/Command Z M/Commands M/CurrentCmd M/DO M/DSM-11 M/DSM-11/20200521 M/DSM-11/20200522 M/ELSE M/ESTART M/ESTOP M/ETRIGGER M/Error List M/FOR M/FormerCmd M/GOTO M/HALT M/HANG M/IF M/ISM-11 M/IsPrefixCmd M/J M/JOB M/Job M/K M/KILL M/LOCK M/LetterIsCmd M/MERGE M/MUMPS-11+ M/MUMPS-15 M/MUMPS-4b M/MWAPI impl M/M Language Elements M/Mcmd M/Mcmdabbr M/Mmeta M/Mumps Language Issues M/NotImpl M/OPEN M/QUIT M/READ M/SET M/TRESTART M/TROLLBACK M/TSTART M/VAX M/VIEW M/XECUTE M/j

Sub pages

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M/ABLOCK M/ASK M/ASSIGN M/ASTART M/ASTOP M/AUNBLOCK M/BREAK M/CLOSE M/Command ?? M/Command A M/Command AB M/Command ABLOCK M/Command ASK M/Command ASSIGN M/Command ASTART M/Command ASTOP M/Command AUNBLOCK M/Command B M/Command BREAK M/Command C M/Command CLOSE M/Command D M/Command DO M/Command E M/Command ELSE M/Command ESTA M/Command ESTART M/Command ESTO M/Command ESTOP M/Command ETRI M/Command ETRIGGER M/Command F M/Command FOR M/Command G M/Command GOTO M/Command H M/Command HALT M/Command HANG M/Command I M/Command IF M/Command J M/Command JOB M/Command K M/Command KILL M/Command L M/Command LOCK M/Command M M/Command MERGE M/Command N M/Command NEW M/Command O M/Command OPEN M/Command P M/Command Q M/Command QUIT M/Command R M/Command READ M/Command S M/Command T M/Command U M/Command V M/Command VIEW M/Command W M/Command WRITE M/Command X M/Command XECUTE M/Command Y M/Command Z M/Commands M/CurrentCmd M/DO M/DSM-11 M/DSM-11/20200521 M/DSM-11/20200522 M/ELSE M/ESTART M/ESTOP M/ETRIGGER M/Error List M/FOR M/FormerCmd M/GOTO M/HALT M/HANG M/IF M/ISM-11 M/IsPrefixCmd M/J M/JOB M/Job M/K M/KILL M/LOCK M/LetterIsCmd M/MERGE M/MUMPS-11+ M/MUMPS-15 M/MUMPS-4b M/MWAPI impl M/M Language Elements M/Mcmd M/Mcmdabbr M/Mmeta M/Mumps Language Issues M/NotImpl M/OPEN M/QUIT M/READ M/SET M/TRESTART M/TROLLBACK M/TSTART M/VAX M/VIEW M/XECUTE M/j

Category:M/sub-site Category:MUMPS/sub-site

WIP (Work In Progress)

• M/Concepts
• M/Commands
• M/Functions
• M/Data Structures

Factoids about M

1. The M ways that can affect the value in a local or global variable are: M/FOR, M/KILL, M/MERGE, M/NEW, M/QUIT, M/READ, M/SET, M/NEW, M/TRESTART, M/TROLLBACK,
2. passing as an argument using M/DO or $$ or M/JOB,
3. the $INCREMENT function and any non-standard syntax
4. any implementation-specific semantics such as M/BREAK, M/CLOSE, M/OPEN, M/USE, M/VIEW, Y* and Z*
5. There are other ways SSVNs and Intrinsic variables can be changed not listed here.