Define Drawing Modification Time

Purpose

The Define Drawing Modification Time function provides information to DWF reading applications about when the .dwf file was last modified.

Syntax

Time The number of seconds elapsed since midnight (00:00:00), January 1, 1970, coordinated universal time (GMT)

Desc Any humanly readable description of the time when the file was last modified

Details

Some DWF reading applications may need to "know" when the .dwf file was last changed. The DWF generating application can indicate this with the Modified opcode:

(Modified 820497600 'January 1, 1996')

Notes

DWF reading applications should not expect to be able to parse the Desc argument, though it could be shown to a user.

A .dwf file should contain at most one occurrence of the modification time opcode, which by convention should be nested inside a Define Drawing Information Block opcode.

Default

By default no drawing modification time is defined, which is equivalent to

(Modified 0 unknown)

Implementation in WHIP! Versions

See Also

Define Drawing Creation Time, Define Source Drawing Creation Time, Define Source Drawing Modification Time, and Define Drawing Information Block