Caché MultiValue Basic Reference
VOC Format
[Home] [Back] 
InterSystems: The power behind what matters   

The format for VOC entries.
The VOC plays a vital part in the MV command processor and the MV file I/O system. Every word found on a command line and every filename opened is looked up in the VOC to determine its meaning or location.
For new and imported accounts, the VOC is created in a specific global, MV.VOC, and is populated with the contents of the NEWACC file stored in sysprog. All accesses to the VOC by system code will go directly to the global ^MV.VOC whereas any accesses by user code will open the file "VOC" or "MD" and access the global specified in the F pointer ( so don't change them from pointing to ^MV.VOC).
VOC Entry Format
The first attribute of a VOC item indicates the type of the item:
"F" File. You can use the LISTF command to list VOC file entries.
"K" Keyword. Keywords used in CMQL are listed in the Caché MultiValue Query Language (CMQL) Reference.
"PA" Paragraph. You can use the LISTPA command to list VOC paragraph entries.
"PH" Phrase. You can use the LISTPH command to list VOC phrase entries.
"PQ" PROC command
"PQN" New PROC command
"Q" Q pointer
"R" Remote
"S" Sentence. You can use the LISTS command to list VOC sentence entries.
"V" Verb
File Definition Format
File Definition
001 F
002 data section
003 dict section
004 M if this is a multi data section file
005 primary class name
006 file options
007 list of data section names
008 list of locations of data sections
009 list of class names for data sections  
The dict and data sections may contain either global references or directory paths.
The file options are any combination of these chars:
Keyword Definition Format
Keyword Definition
001 "K"
002 Canonical form of the keyword. This is the text that is passed to the parser.
003 Alternate VOC entry to use if this word is used as a verb.
Verb Definition Format
Verb Definition
001 V
002 Function name
003 Location code
004 Processing Options
005 Parsing Options
007 BasicObjectPointer Location
008 ItemID of Basic Program
009 Filename of Basic Program
010 Account of Basic Program
The Location code directs the shell to the correct routine.
The Processing options are a set of single character codes passed to CMQL:
The Parsing options control the shell's operation:

Send us comments on this page
Copyright © 1997-2019 InterSystems Corporation, Cambridge, MA