| OSyncAnchor | OSyncAnchor struct |
| OSyncArchive | Represent a Archive object |
| OSyncCapabilities | Represent a Capabilities object |
| OSyncCapabilitiesObjType | Represent a CapabilitiesObjType object |
| OSyncCapability | Represents a Capability object |
| OSyncChange | A change object |
| OSyncChangeUpdate | Struct for the change status callback |
| OSyncCustomFilter | Represents a custom filter that can be used to call hooks |
| OSyncData | A data object |
| OSyncDB | A OSyncDB object |
| OSyncEngineUpdate | Struct for the engine status callback |
| OSyncError | Represent an error |
| OSyncFilter | Represents a filter to filter changes |
| OSyncFormatConverter | Represent a converter from one format to another |
| OSyncFormatConverterPath | Shortest conversion path between formats |
| OSyncFormatConverterTree | Search tree for format converters |
| OSyncFormatEnv | The environment used for conversions |
| OSyncGroup | Represent a group of members that should be synchronized |
| OSyncGroupEnv | Represent a environment of groups that should be synchronized |
| OSyncHashTable | Represent a hashtable which can be used to check if changes have been modifed or deleted |
| OSyncMapping | Entry list of Mappings |
| OSyncMappingEntry | A Mapping Entry |
| OSyncMappingTable | List of Mappings |
| OSyncMappingUpdate | Struct for the mapping status callback |
| OSyncMarshal | A OSyncMarshal object |
| OSyncMember | A member of a group which represent a single device |
| OSyncMemberUpdate | Struct for the member status callback |
| OSyncMessage | A OSyncMessage |
| OSyncModule | Represent a synchronzation plugin |
| OSyncObjFormat | Represent a format for a object type |
| OSyncObjFormatSink | Represent a sink for a object format |
| OSyncPendingMessage | Pending Message object |
| OSyncPluginAdvancedOption | Gives information about advanced plugin options |
| OSyncPluginAuthentication | Gives information about required authentication settings |
| OSyncPluginConfig | Gives information about the plugin configuration |
| OSyncPluginConnection | Gives information about the current connection type |
| OSyncPluginConnectionTypeString | OSyncPluginConnectionType String Map |
| OSyncPluginLocalization | Gives information about current localization settings |
| OSyncPluginResource | Gives information about resource |
| OSyncQueue | Represents a Queue which can be used to receive messages |
| OSyncSinkEngine | OSyncSinkEngine struct members |
| OSyncThread | Represents a Thread |
| OSyncTimeoutInfo | Timeout object |
| OSyncUpdater | Represents an OpenSync Updater |
| OSyncUpdaterStatus | Represents the status of an update |
| OSyncXMLField | Represent a XMLField object |
| OSyncXMLFieldList | Represent a XMLFieldList object |
| OSyncXMLFormat | Represent a XMLFormat object |
| OSyncXMLFormatSchema | Represents a Schema object |
1.5.7.1