Method and system for generating and maintaining property sets w

Details Method and system for generating and maintaining property sets w Method and system for generating and maintaining property sets w

1994-04-15

1995-11-14

Black, Thomas G.

G06F 1730

Patent

active

054674727

ABSTRACT:
A method and system for generating and maintaining property sets is provided. In a preferred embodiment, a property set stream is generated. The stream comprises three parts: a header, a section locator array, and one or more sections. The header contains information for uniquely identifying the property set and for identifying the number of sections within the property set. The section locator array contains a unique identifier for each section and an offset indicating where the section resides within the stream. The third part, the section definitions, contains the information necessary to maintain groups of properties for each section. Each section contains a section header, a property locator array, and an array of property type/value pairs. The section header indicates both the size of the section and the number of properties defined within the section. The property locator array contains unique property identifiers for each property defined in the section and a relative offset, from the beginning of the section, to the property definition. Each property definition appears as a type/value pair, the type indicator indicating the data format for the property and the value field containing or referencing the data. In a preferred embodiment, a property set is generated by allocating appropriate storage and by storing values in the standard structure for a property set.

REFERENCES:
patent: 5270831 (1993-12-01), Parulski et al.
"A Guide to the Tag Image File Format Version 5.0" Hewlett-Packard Corp., pp. 1-9, 17-18, Aug. 1990.
Harris, Jed and Ira Ruben, Bento Specification, Revision 1.0d4, Apple Computer, Inc., Aug. 17, 1992.
Cohen Raines, "Apple sets Bento standard for mixing diverse data types", MacWeek, vol. 6, No. 3, 1992.
Aldus TIFF Developer's Toolkit, pp. i-vi, 3-6, Aldus Corporation, Sep. 1990.

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