The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2006
Filed:
Nov. 01, 2002
Billy J. Fuller, Woodinville, WA (US);
Donald J. Hacherl, North Bend, WA (US);
Billy J. Fuller, Woodinville, WA (US);
Donald J. Hacherl, North Bend, WA (US);
Microsoft Corporation, Redmond, VA (US);
Abstract
A new schema implementation enables reversible changes to be made to definitions in a schema. The definitions of attributes and classes are in the form of schema objects. Each schema object has an internal ID in addition to its unique name and object ID (OID), and a deactivation flag for indicating whether the schema object has been deactivated. To modify an attribute or class, the corresponding schema object is deactivated by setting its deactivation flag to 'TRUE,' and a new schema object is created to contain the changes. The new schema object has the same unique name and OID as the old schema object but is given a different internal ID. When a client wants to access instances of the schema object by its unique name or OID, a translation is made to provide the internal ID of the new schema object such that instances of the new schema object are located instead of the old schema object. The changes to the schema can be reversed by reactivating the first schema object and deactivating the second schema object.