| 摘要 |
In one embodiment, a file includes data that is divided into a plurality of sections, and each section may include metadata that includes the revision history for that section. A specific section of the file may be selected and its revision history queried. In response to such a query, the revision history for the selected section is extracted from the section metadata and may be displayed. If a portion of a section has been copied from a source section and pasted into a target section, the section metadata for the target section may be updated to include information about the source section. For each change to the section data, the section metadata may also include a version number, a revision date and time, a revision author and the actual insertion, deletion or other change to the section data.
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