Database Management
Reference Manual
Distributed Attributes
:
Configuration
: Create Distributed Attributes Schema
Create Distributed Attributes Schema
The distributed attribute schema, associating elements with the distributed attribute group must then be created.
There are two administrative levels, DSXWLD and DSXGRP that is left without any specific explanation. They serve the same purpose of grouping things, that is schemas, UDAs together. Distributed attributes schemas are configured using the DSXSCH, DSXOWN and DSXMBR objects in the lexicon application.
Schema, DSXSCH
A distributed attribute schema is represented by the DSXSCH element, and consists of a name and an optional default home reference. The default home reference may be overridden at lower levels in the schema. At present, all schemas are treated as one unified schema; this functionality is subject to change.
Binding Element Type Definition, DSXOWN
You can define the element types that may be extended by distributed attributes. The definition contains an element list (ELEL) which designates the element types. It also contains a default home reference that, if set override default home defined on schema level.
Distributed Attribute Definition, DSXMBR
The last part of the distributed attributes schema definition is to associate the UDETs that form the distributed attributes for the owning elements specified in DSXOWN. The definition specifies which XPITEM based UDETs that can be used as distributed attributes for the specified owner. There is a cardinality definition available that defines the minimum and maximum number of each of the distributed attributes that may be created. A -1 in the maximum definition represents an infinite number. It also contains an allocation reference that might override anything defined at schema or owner level.
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