| Condition | 
 Represents a condition that is part of a SQL where clause. 
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| ConditionList | 
 This condition subclass represents a list of conditions. 
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| ConditionParser | 
 A class to parse a condition string and return a condition. 
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| DataUtils | 
 Utility methods for RMProperty. 
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| Entity | 
 This class represents an entity for a data source. 
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| Property | 
 This class describes an attribute of an entity. 
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| Query | 
 An object to fetch a dataset from a data source entity with a set condition and parameters. 
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| Schema | 
 This class describes the structure of a data source by managing a list of entities. 
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| Sort | 
 This class provides a basic description for comparison and sorting with a simple key and order (ascending or
 descending). 
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