M

mail facility

See IDB Mail Facility.

mainline dialog

In CA ADS, a dialog that is designated as an entry point to an application thread. A dialog is specified as mainline through the dialog compiler.

MAINTAIN INDEX utility statement

For a non-SQL defined database, the utility that builds, rebuilds, or deletes one or more indexes.

major code

The first part of the two-part value returned to the ERROR-STATUS field of the IDMS and IDMS-DC communications blocks upon completion of a non-SQL DML function. The major code, a two-byte value, identifies the DML function performed:

The value 00 applies to all DML functions.

Values in the range 01 through 20 identify database functions, both online and batch.

Values in the range 30 through 51 identify DC/UCF functions.

See also minor code.

MANDATORY membership

A membership option that determines how member record occurrences are disconnected from the set. When a record has mandatory membership in a set, occurrences of that record are disconnected from the set with the ERASE function.

MANUAL membership

A membership option that determines how member record occurrences are connected to the set. When a record has manual membership in a set, occurrences of that record are connected to the set with the CONNECT function.

map

1) A formatted layout of a terminal screen. A map names the literal and variable fields on the screen, identifies the location of each field on the screen, names the record element associated with each variable field, assigns display characteristics (attributes), and defines editing criteria. Maps are created through the DC/UCF mapping facility. 2) An IDD entity type that documents the maps (or tables) used by teleprocessing monitors.

map level help

Help text associated with a map by means of the online or batch map compilers, and which is displayed when the help key defined for the map is pressed either with the cursor positioned in a data field for which no field-specific help is defined or outside of any data field. See also help facility, field level help.

map load module

The load module generated by the DC/UCF Mapping Facility. Programs and dialogs execute map load modules to display and receive data.

map request block (MRB)

The control block used to perform mapping operations.

map work record

A record associated directly with a map. The record is automatically available to a dialog or program that uses the map. Map work records can be schema records or records built using IDD. See also dialog work record.

MAPB

The task code for the online map compiler for creating batch file maps that are used by ADS/Batch. See also RHDCMAP1, RHDCMPUT.

MAPC

The task code for the online map compiler for creating online maps. See also RHDCMAP1 RHDCMPUT.

mapin

The mapping operation in which values entered by the terminal operator into variable map fields are moved into program variable storage. In CA ADS, each mapin operation begins a new task.

mapout

The mapping operation in which a map is displayed at the terminal. Literal fields are moved to their assigned positions, and the contents of the associated data areas in variable storage are moved to the map's data fields.

mapping

The method used by CA IDMS online facilities to transfer a complete screen of data between application programs and a terminal.

mapping compilers

Batch and online mapping tools:

The batch compiler (RHDCMAP1) and batch utility (RHDCMPUT) allow you to define, generate, decompile, report on, and delete maps in batch mode.

The online mapping compiler (also known as MAPC) allows you to define, generate, and delete maps in online mode.

Mapping Facility

A tool that you use to define the layout of maps.

mapping mode

In CA IDMS/DC terminal management functions, the mode in which an entire screen of data is transferred, field by field. Mapping mode can be used with 3270-type terminals and also with glass TTYs that have associated device independence tables.

master terminal function

See DCMT task.

MDT

See modified data tag.

member record

A database record type defined as subordinate to an owner record type in a one-to-many relationship. For example, in a relationship defined between a DEPT owner and an EMPLOYEE member, each department can contain several employees.

membership

In CA ICMS, the relationship between an entity and the folder or group in which that entity is included. (Both objects and folders can be members of folders; both users and groups can be members of groups.)

membership options

In a non-SQL schema, the specifications that indicate how a member record occurrence is connected to or disconnected from a set occurrence. For a given record in a set, the schema can specify one of the following membership options: MANDATORY AUTOMATIC, MANDATORY MANUAL, OPTIONAL AUTOMATIC, or OPTIONAL MANUAL.

See menu map.

menu function

In CA ADS, an application function that displays a system-defined menu map and performs standard system-supplied menu processing activities at runtime. See also application function.

menu map

A map containing a list of valid responses the user can select. In CA ADS, menu maps are automatically built for an application defined by using the application compiler. A menu map must be defined to coordinate with system-supplied menu processing facilities. CA ADS provides three system-defined menu maps for use in CA ADS applications. Users can also define their own menu maps. See also map, menu function.

menu mode

The menu-driven version of the online debugger, CA OLQ, and IDD.

menu stack

In CA ADS, the sequence of menus and menu/dialogs that the user has executed but through which the user has not yet returned. The CA ADS runtime system uses the menu stack to manage the flow of control through menus at runtime.

menu/dialog function

In CA ADS, an application function defined as a menu function and also associated with a dialog. Like a menu function, the menu/dialog function uses system-supplied menu processing facilities. However, the menu/dialog function can also perform any processing defined in the associated dialog. See also application function, menu function, and menu map.

Merge Archive utility statement

The utility that is used to merge the archived journal files of Data Sharing group members that are sharing update access to data. It can also be used to merge archive and local mode journal files to simplify a subsequent recovery operation.

message

An IDD entity type that documents informational messages to be used in DC/UCF applications.

message area

See DDLDCMSG area.

message field

In the Mapping Facility, a map field that displays messages generated by an application program or by the automatic error-handling facility.

migration

1) The process of moving components from one system to another. 2) The process of moving an application from a test system to a production system. 3) The conversion of a software system from one type of hardware to another or from one type of software architecture to another. 4) The process of upgrading an installed product to a new release of that product. 5) The process of moving source and/or load modules from one data dictionary to another.

minimum fragment

The smallest portion of a variable-length record to be stored on a page other than the record's home page. The minimum fragment specification, provided in the non-SQL defined schema, is used when a record's home page is too full to store the complete record.

minimum path

In CA ICMS, the shortest path that uniquely identifies an entity in the catalog.

minimum root

The smallest portion of a variable-length record to be stored on the record's home page. The minimum root specification, provided in the schema, is used when a record's home page is too full to store the complete record.

minor code

The second part of the two-part value returned to the ERROR-STATUS field of the IDMS and IDMS-DC communications blocks upon completion of a non-SQL DML function. The minor code, a two-byte value, describes the status of the function identified by the major code. See also major code.

mixed page group feature

In CA IDMS/DB, the feature that allows a database session to access data in different page groups. Specifying MIXED PAGE GROUP BINDS ALLOWED when defining a DBNAME activates this feature for all sessions connecting or binding to the DBNAME.

model dialog

In ASF, the default dialog used to generate dialogs for data tables. The model dialog is stored as a source module in the DDLDML area of the ASF dictionary.

model map

In ASF, the default map used to generate screen displays for data tables. The model map is stored in the DDLDML area of the ASF dictionary.

model subschema

In ASF, the default subschema used to generate subschemas for data tables. The model subschema is stored as a source module in the DDLDML area of the ASF dictionary.

modified data tag

For a variable field on a map, the internal tag that keeps track of whether or not the value in that field has been changed by the terminal operator.

MODIFY

The navigational database access function that replaces the contents of a database-record occurrence with the values in its corresponding variable storage.

MODIFY logical record

The LRF database access function that replaces the contents of a logical-record occurrence with the values in its corresponding variable storage.

MODIFY path group

A collection of paths (predefined in a logical-record subschema) designed to service application programs that request a MODIFY logical-record function.

module

An IDD entity type used to define source code for processes, qfiles, edit tables, code tables, reports, and transactions.

MPMODE

See multiprocessing mode.

MRB

See map request block (MRB).

multihomed system

A system on which multiple network interfaces (instances of TCP/IP) are active.

multilevel hierarchy

A relationship formed when a member of a set is the owner of another set.

multiple membership

The relationship formed when a given record type is owned by more than one record type and, thus, is a member in more than one set type.

multiple selectors

In LRF, two or more ELEMENT, FIELDNAME, FIELDNAME-EQ, or KEYWORD selectors specified in a single SELECT clause. Only a program request whose WHERE clause references all of the named selectors can be matched to this path.

multiple sets

The relationship formed when one record type is related to a second record type in more than one way.

multiple-member relationship

A single relationship maintained for more than one child entity type.

multiple-member set

A set in which two or more record types participate as members.

multiple-set ownership

A relationship formed when one record type owns more than one set.

multiprocessing mode

The code lock that DC/UCF uses to enforce execution serialization in a multitasking environment. Multiprocessing modes divide code into families. Certain families ensure serial execution of all code that has been assigned to that family while other families allow concurrent code execution. By serializing only that code which requires it, DC/UCF is able to increase throughput by exploiting multiple CPUs.

multiprogramming

Under DC/UCF, the ability to execute several different tasks concurrently. Multiprogramming enables a system to run large-volume online and batch programs simultaneously.

multitasking

In the DC/UCF environment, the ability to run multiple operating-system subtasks at the same time. DC/UCF supports multitasking in a uniprocessing and multiprocessing environment.

multithreading

Under DC/UCF, the ability of two or more different tasks to execute a reentrant program concurrently. Multithreading conserves storage and reduces CPU overhead.