On Thu, 11 Sep 2008 22:40:01 -0700, Dennis Lee Bieber wrote: > On 12 Sep 2008 03:37:51 GMT, Steven D'Aprano > <[EMAIL PROTECTED]> declaimed the following in > comp.lang.python: > > >> I'm pretty sure you're wrong. XML can be used for serialization, but >> that doesn't mean it is only sequential data. XML is suitable for >> hierarchical data too. To quote Wikipedia: >> > There is a difference between the format of the data content, and > the processing of that data... Regardless of the content, one > essentially has to process the XML /file/ sequentially, and translate > into an in-memory model that allows for accessing said data. To reach > the nth subelement of the mth element requires reading all 1..m-1 > elements, followed by all 1..n-1 subelements in m. Modifying any element > requires rewriting the entire file.
Which is why I previously said that XML was not well suited for random access. I think we're starting to be sucked into a vortex of obtuse and opaque communication. We agree that XML can store hierarchical data, and that it has to be read and written sequentially, and that whatever the merits of castironpi's software, his original use-case of random access to a 4GB XML file isn't workable. Yes? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
