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The OpenCDS backend is configured using one of three methods: Classpath, Filesystem and BDB. The choice of configuration strategy is made within the opencds.properties file (see OpenCDS RunTime Installation Guide for details).
The internal configuration model is shown in the diagram below (click to enlarge). The model is similar to the models in the Configuration Schemas.
The elements that will most often change are KnowledgeModule, SupportingData and ConceptDeterminationMethod. ExecutionEngine and SemanticSignifier will only change when additional/alternate rules engines or new versions of vMR (or other supported specifications), respectively, are added to the implementation. Only two DssOperations are currently supported: EVALUATION.EVALUATE and EVALUATION.EVALUATE_AT_SPECIFIED_TIME.
BerkeleyDB (BDB)
When OpenCDS is configured using the BDB-based configuration, it will look for configuration in the BDB database in the store folder within the folder specified by the knowledge-repository-path. The opencds.properties file must contain the following lines to enable this configuration strategy:
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