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3. \CDB\GTModel\:
This is the entry directory that contains the Geotypical Models Datasets. The directory structure is as defined in Section 3.4, GTModel Library Datasets.
4. \CDB\MModel\:
This is the entry directory that contains the Moving Models Datasets. The directory structure is defined in Section 3.5, MModel Library Datasets.
5. \CDB\Tiles\:
This is the entry directory that contains all tiles within the CDB instance. The directory structure is defined in Section 3.6, CDB Tiled Datasets.
6. \CDB\Navigation\:
This is the entry directory that contains the global Navigation datasets. The directory structure is defined in Section 3.7, Navigation Library Dataset
Most of the CDB datasets are organized in a tile structure and stored under \CDB\Tiles\ directory. The tile structure facilitates access to the information in real-time by the runtime
client-devices. However, for some datasets such as Moving Models or geotypical models datasets that require minimal storage, there is no significant advantage to be added from such a
tile structure. Such datasets are referred to as global datasets; they consist of data elements that are global to the earth, i.e., no structure other than the datasets is provided.
3.1.1 Metadata Directory
There is one directory containing metadata files that are global to the overall CDB structure. \CDB\Metadata contains metadata files that define the various sets of naming hierarchies and
definitions used throughout the CDB. File content is described in Section 5.1, Metadata Datasets. Most metadata files except one are optional and CDB users must implement default
behaviors, according to information contained in this Specification. The \CDB\Metadata directory contains the following metadata files:
1. “Lights” Definitions Metadata file:
This file contains the metadata that defines the light points name hierarchy for the CDB. Refer to Section 2.3, Light Naming, for a description of the light
type hierarchy. A listing of the CDB light type hierarchy can be found in Appendix E. The hierarchy found in Appendix E must be used when
“Lights.xml” is not found in the metadata directory. Refer to section 5.1.1 Light Name Hierarchy Metadata for a description of the light point name
hierarchy file.
2. “Model_Components” Definitions Metadata file:
This file contains the metadata that defines the CDB model components. Refer to Section 2.4, Model Component Naming, for a description of the
model components. A listing of the CDB model components can be found in Appendix F. Refer to section 5.1.2 Model Components Definition Metadata
for a description of the model component file.
3. “Materials” Definitions Metadata file:
This file contains the base material names for the CDB. Refer to Section 2.5,
