On Tue, 8 Jul 2008, Yegor Kozlov wrote:
Interesting, these latests specs are much more verbose than the ones released in February 2008. For example, the XLS spec is now about 40 MB vs 5 MB in the February's edition!
And they seem to have listened to us, and included more things, such as the macro stream docs :)
The funny thing is that the formats of ppt and xls graphs are very similar. Both follow BIFF conventions - 4 byte header, Continue, EOF/BOF records, etc. The main difference is that in ppt graphs are stored in a separate OLE stream while in xls it is embedded right in the workbook stream. So, the code base should be common and reusable across POI sub-projects.
That sounds handy. There's already quite a bit of record level code in HSSF, it's just the high level code to create / modify / delete them that we lack, plus probably a few of the records. If someone was to have time to work on it, I'd suggest shuffling quite a bit of this stuff out of hssf, and into something like dgrf (Dreadful GRaphing Format), then expand it there for hssf+hslf
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