Default Exchange Store Namespaces

Topic Last Modified: 2006-06-12

The Exchange store defines and reserves the namespaces listed in the following table. These namespaces can be used in property names.

Namespace Description

DAV: Namespace

Properties defined for the WebDAV protocol, including properties for general data access (such as the href Field) and for determining hierarchical information (such as the isfolder Field).

https://schemas.microsoft.com/exchange/ Namespace

Properties specific to Microsoft® Exchange Server 2007 and Exchange store.

https://schemas.microsoft.com/exchange/events/ Namespace

Properties used to create event sink binding items.

urn:schemas-microsoft-com:office:forms Namespace

Properties used to register HTML forms in the Exchange store.

https://schemas.microsoft.com/exchange/security/ Namespace

Properties specific to security features for items in the Exchange store.

urn:schemas-microsoft-com:datatypes Namespace

Definitions for data types used when creating schema items.

urn:schemas-microsoft-com:exch-data: Namespace

Definitions for Exchange-specific data types used for Exchange store properties.

urn:schemas-microsoft-com:xml-data Namespace

Definitions for XML namespaces that incorporate dynamic data typing and binding.

urn:schemas-microsoft-com:office:office Namespace

Properties specific to Microsoft Office files.

urn:schemas:calendar: Namespace

Properties used for calendaring. The following properties are also available for Collaboration Data Objects (CDO) calendar objects: Appointment CoClass, CalendarMessage CoClass, and Addressee CoClass.

urn:schemas:contacts: Namespace

Properties for managing contacts. Several properties are also available for the CDO Person CoClass object.

urn:schemas:httpmail: Namespace

Fields used to create and process the body of a message. For fields in the header of a message, use the mail header namespace.

urn:schemas:mailheader: Namespace

Standard mail header properties for messages. Several properties are also available for the CDO Message CoClass object.

When adding your own properties to items, you use your own namespace Uniform Resource Identifier (URI) in the property name to make each one unique.