| Horde_Data_Storage | Abstract class that implements the temporary storage backend. |
| Horde_Data | Abstract class to handle different kinds of Data formats and to help data exchange between Horde applications and external sources. |
| Horde_Data_Base | Abstract class that Data drivers extend. |
| Horde_Data_Csv | Horde_Data implementation for comma-separated data (CSV). |
| Horde_Data_Exception | Exception handler for the Horde_Data package. |
| Horde_Data_Exception_Charset | Exception handler for the Horde_Data package that indicates the wrong charset was provided for the given data. |
| Horde_Data_Icalendar | This is iCalendar (vCalendar). |
| Horde_Data_Imc | Abstract implementation of the Horde_Data:: API for IMC data - vCards and iCalendar data, etc. |
| Horde_Data_Outlookcsv | Horde_Data implementation for Outlook comma-separated data (CSV). |
| Horde_Data_Storage_Mock | A mocked version of the storage class that stores data for the current page access only. |
| Horde_Data_Translation | Horde_Data_Translation is the translation wrapper class for Horde_Data. |
| Horde_Data_Tsv | Horde_Data implementation for tab-separated data (TSV). |
| Horde_Data_Vcard | Implement the Horde_Data:: API for vCard data. |
| Horde_Data_Vnote | Implement the Horde_Data:: API for vNote data. |
| Horde_Data_Vtodo | Implement the Horde_Data:: API for vTodo data. |