When typing documents, they often go through changes and editing. Different authors work on differnt parts of it; things are deleted, added and taken away. When you send the document to someone I bet you never thought that with little effort they can see your revisions and other things that you might not want them to see.
Cnet / NY Times writes Technically, metadata is sort of the DNA of documents created with modern word-processing software. By default, it is automatically saved into the deep structure of a file, hidden from view, with information that can hint at authorship, times and dates of revisions (along with names of editors) and other tidbits that, while perhaps useful to those creating the document, might be better left unseen by the wider world.
(If you use Microsoft Word, open a document, go to the File menu and choose Properties. You should see some metadata. Third-party programs are available that will crack open even more.)
According to some technologists, including Dennis M. Kennedy, a lawyer and consultant based in St. Louis, (denniskennedy.com), metadata might include other bits of information like notes and questions rendered as “comments” within a document (“need to be more specific here,” for example, or in the case of my editors, “eh??”), or the deletions and insertions logged by such features as “track changes” in Microsoft Word.
“If you take the time to educate yourself a little and know the issues,” Kennedy said, “you can avoid problems pretty easily.”
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