Filter +criteria for landmark databases

The following table describes the Filter object +properties for GetList calls +that retrieve information about landmark databases.

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**Table:** Filter object +properties for a database search
+ Property +	+ Description +	+ Type +	+ Value +
+ `[Filter.DbProtocol]` +	+ Specifies the protocol for accessing databases. + If this property is specified, `GetList` returns +a list of all the databases that use this protocol. If the protocol is not +specified, `GetList` returns a list of all the available +databases. +	+ string +	+ For example: `"file://"` +