2.3. Working with the Data Model

In order to use the DCM API effectively, you will need to understand how to use the DCM API to navigate the data model. The DCM Catalog defines the following data elements:

• the devices available for installation
• the families to which the installable devices belong
• the configuration parameters that apply to each device
• the properties to which configuration parameters belong
• the scope (device, family, or global) of each parameter

The DCM Catalog provides data elements for only those devices that are supported by the Intel® Dialogic System Software release of which the DCM API is a component. The DCM API enables you to instantiate devices and to set the values of their parameters in your system configuration. It prevents you from adding to or modifying the data elements that constitute the DCM Catalog.

In order to instantiate devices and modify configuration parameter values, you will need to carry out the following preliminary steps:

1. Populate the required structures.
2. Determine configuration parameter scope.
3. Read and write configuration parameter values.

These steps are described in the subsections that follow.

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