| Class | Description |
| BaseTable | Represents a DataEngine base table, that is, a table filled with rows imported from data source(s). |
| Column | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| ColumnCondition | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| ColumnCopy | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| ColumnDerived | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| ColumnOp | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| ColumnOpCustom | |
| ColumnOpCustomBase | |
| ColumnOpCustomGroup | |
| Columns | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| Condition | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| CondValue | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| CondValues | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| Connector | Base class for ComponentOne DataEngine data connectors. |
| DbConnector | Connector for importing data to a DataEngine table from a database. |
| JoinColumns | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| JoinQuery | Represents a DataEngine query joining a main table with one or more linked tables. |
| LicenseManager | Allows the users to set a license in the Key property. |
| ObjectConnector<T> | Connector for importing data to a DataEngine table from an arbitrary IEnumerable. |
| Op | Class used in specifying queries. See "DataEngine queries" for explanations of how queries are created and executed. |
| Query | Represents a DataEngine query, that is, a table filled with rows computed by DataEngine from one or more base tables by applying query operations. |
| Table | Base class for BaseTable and Query. |
| UnsupportedTypeException | Exception for unsupported types in DbConnector. |
| Values | |
| Workspace | Provides access to the ComponentOne DataEngine. |