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https://issues.apache.org/jira/browse/UIMA-5274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on UIMA-5274 started by Burn Lewis.
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> Support descriptor customization by allowing external setting variables in
> some fields
> --------------------------------------------------------------------------------------
>
> Key: UIMA-5274
> URL: https://issues.apache.org/jira/browse/UIMA-5274
> Project: UIMA
> Issue Type: Improvement
> Components: Core Java Framework
> Reporter: Burn Lewis
> Assignee: Burn Lewis
> Priority: Minor
> Fix For: 3.0.0SDK-beta, 2.10.0SDK
>
>
> Currently the <envVarRef> element supports customization via system
> properties in 4 ways (see below). UIMA could also support the
> $\{variable-name} syntax in these text fields. In addition it could also be
> supported in the value for the name and location attributes of the import
> element so that an aggregate's delegates could be controlled via external
> settings. This might also be done by changing the primitive descriptor as in
> 2 & 3 below, but in some cases a completely different delegate descriptor is
> preferable.
> From the References document:
> The syntax for environment variable references is
> <envVarRef>[VariableName]</envVarRef> , where [VariableName] is any valid
> Java system property name. Environment variable references are valid in the
> following places:
> 1) The value of a configuration parameter (String-valued parameters only)
> 2) The <annotatorImplementationName> element of a primitive AE descriptor
> 3) The <name> element within <analysisEngineMetaData>
> 4) Within a <fileResourceSpecifier> or <fileLanguageResourceSpecifier>
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