Component Categories for Describing Internet-Aware Objects

In all the different features defined in this article, there are various useful categories for describing what an object requires from its container as well as what features an object supports, which is useful in a container's browsing UI. The following tables describe the meaning for categories as both "implemented" and "required" categories.

"Required" categories	Description
CATID_PersistsToMoniker, CATID_PersistsToStreamInit, CATID_PersistsToStream, CATID_PersistsToStorage, CATID_PersistsToMemory, CATID_PersistsToFile, CATID_PersistsToPropertyBag	Each category is mutually exclusive and is used only when an object supports but one persistence mechanism at all (thus the mutual exclusion). Containers that do not support the persistence mechanism described by one of these categories should prevent themselves from creating an object of classes so marked.
CATID_RequiresDataPathHost	The object requires the ability to save data to one or more paths and requires container involvement, therefore requiring container support for IBindHost.

"Implemented" categories	Description
CATID_PersistsToMoniker, CATID_PersistsToStreamInit, CATID_PersistsToStream, CATID_PersistsToStorage, CATID_PersistsToMemory, CATID_PersistsToFile, CATID_PersistsToPropertyBag	Object supports the corresponding IPersist* mechanism for the category.
CATID_InternetAware	The object is Internet-aware, meaning that the object needs no special behavior to work well in the Internet environment, or the object uses large data sets but is written to retrieve that data asynchronously. In addition, all Internet-aware objects are marked with OLEMISC_SETCLIENTSITEFIRST. This category is defined to help authoring tools differentiate between objects that might or might not understand the special implications of the Internet.

The following table provides the exact CATIDs assigned to each category.

Category	CATID
CATID_RequiresDataPathHost	0de86a50-2baa-11cf-a229-00aa003d7352
CATID_PersistsToMoniker	0de86a51-2baa-11cf-a229-00aa003d7352
CATID_PersistsToStorage	0de86a52-2baa-11cf-a229-00aa003d7352
CATID_PersistsToStreamInit	0de86a53-2baa-11cf-a229-00aa003d7352
CATID_PersistsToStream	0de86a54-2baa-11cf-a229-00aa003d7352
CATID_PersistsToMemory	0de86a55-2baa-11cf-a229-00aa003d7352
CATID_PersistsToFile	0de86a56-2baa-11cf-a229-00aa003d7352
CATID_PersistsToPropertyBag	0de86a57-2baa-11cf-a229-00aa003d7352
CATID_InternetAware	0de86a58-2baa-11cf-a229-00aa003d7352

For more information on categories, see the Component Categories document.