The following attributes are extension attributes for the camunda namespace http://camunda.org/schema/1.0/dmn.

historyTimeToLive

Description
The attribute specifies the history time to live (in days) for the decision definition. It is used within History cleanup.
Type
——-
`java.lang.Integer or java.lang.String`
Possible Values
——-
Any non-negative integer number or string containing a time in days defined by the ISO-8601 date format.
Default Value
——-
null - means that decision definition history won't ever be removed during history cleanup run
DMN 1.1 Elements
——-
Decision

inputVariable

Description
This attribute specifies the variable name which can be used to access the result of the input expression in an input entry expression.
Type
——-
`java.lang.String`
Possible Values
——-
The name of the variable as `java.lang.String`.
Default Value
——-
`cellInput`
DMN 1.1 Elements
——-
Input

Description

The attribute specifies a version tag for the process definition.

Type
`java.lang.String`
Possible Values
——-
Any value that has a meaning as version tag for the decision definition. Note: Sorting by versionTag is string based. The version will not be interpreted. As an example, the sorting could return v0.1.0, v0.10.0, v0.2.0.
Default Value
——-
–
DMN 1.1 Elements
——-
Decision

原文: https://docs.camunda.org/manual/7.9/reference/dmn11/custom-extensions/camunda-attributes/