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              GSF.
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| Class | Description | |
|---|---|---|
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              DataService | A base class for web service that can send and receive historian data over REST (Representational State Transfer) interface. | 
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              DataServices | A class that loads all of the data web services. | 
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              MetadataService | Represents a REST web service for historian metadata. | 
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              SerializableMetadata | Represents a container for SerializableMetadataRecords that can be serialized using XmlSerializer or DataContractJsonSerializer. | 
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              SerializableMetadataRecord | Represents a flattened MetadataRecord that can be serialized using XmlSerializer, DataContractSerializer or DataContractJsonSerializer. | 
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              SerializableReadRequestData | Represents a container for JSON serialized time-series data read request. | 
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              SerializableTimeSeriesData | Represents a container for SerializableTimeSeriesDataPoints that can be serialized using XmlSerializer or DataContractJsonSerializer. | 
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              SerializableTimeSeriesDataPoint | Represents a time-series data-point that can be serialized using XmlSerializer, DataContractSerializer or DataContractJsonSerializer. | 
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              TimeSeriesDataService | Represents a REST web service for time-series data. | 
| Interface | Description | |
|---|---|---|
| 
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              IDataService | Defines a web service that can send and receive historian data over REST (Representational State Transfer) interface. | 
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              IMetadataService | Defines a REST web service for historian metadata. | 
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              ITimeSeriesDataService | Defines a REST web service for time-series data. | 
| Enumeration | Description | |
|---|---|---|
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              DataFlowDirection | Indicates the direction in which data will be flowing from a web service. |