Ask Slashdot: What Is the Best Open Document Format?

kramer2718 writes: I am working on a project that requires uploading and storing of documents. Although the application will need to allow uploading of .docx, doc, .pdf, etc, I'd like to store the documents in a standard open format that will allow easy search, compression, rendering, etc. Which open document format is the best? Since "best" can be highly driven by circumstances, please explain your reasoning, too. Have a question for Slashdot's readers? Take a look at other recent questions first to see if someone else has had a similar question. And if not, ask away! The more details and context you include, the more likely your question will be selected.