Open XML links for 02-25-2007

I'm back home after a week on the road, with lots of interesting work to finish up and an overflowing in-box to attend to. But first things first: I went through all my RSS feeds this evening, and here are a few items that may be of interest to Open XML developers ...

Digital Signatures

Wouter Van Vugt has a great post on how to work with digital signatures in Open XML. The basic concepts are simple: you can sign any list of parts or relationships in a document, and a document can contain any number of signatures.

The implementation, however, can get a bit more complex. Wouter explains the steps involved, and his post also includes a simple sample application with C# source code using the System.IO.Packaging API that's available in the .NET Framework 3.0.

CSS and Document Standards

HÃ¥kon Wium Lie, CEO of Opera (the browser publisher), has sounded off on document format standards in an editorial on Cnet. Perhaps not surprisingly, Lie thinks there is a CSS approach that would work better than either ODF or Open XML.

I'm a bit doubtful of that claim myself, but I did enjoy some of the comments on the Slashdot thread about Lie's editorial. And on a tangential note, I've found his CSS book so useful that I've bought two copies with my own money over the years since the first edition came out. (It's not a reference, it's a guided tour of the underlying philosophy of CSS -- if that's what you want, this is the book.)

OMPM Released

The Office Migration Planning Manager has been officially released, including the Office File Converter I blogged about recently here.