There are several errors in the msilib documentation.  I'm sure I
haven't found them all, but here are some:

- add_data is documented to have two arguments.  In reality it has three.
- Execute on a View object is documented to have an optional argument. 
In reality it has a single required argument whose value may be None.
- When I click on any of the references to Microsoft documentation, I
get a page in Japanese.  This is possibly more due to Microsoft than
anything else (the links do contain en-us so it is a tad surprising).
- There is extremely little information on how to actually use the module.

Today the links to Microsoft documentation go to English language pages,
so that part of the bug report can be skipped.

Fixed the Execute parameter in r64630. add_data was already fixed.

Assigning to Martin; if someone is to write usage info, it's got to be him.

As for "how to use the module": what do you want to use the module for,
and what kind of information would you need for that?

Here's another one:

class Directory shows an extra arg, "component", which isn't in the code.

Martin cannot write anything until someone answers his question. In the meanwhile, any doc person could, as suggested by Bill, change

class msilib.Directory(database, cab, basedir, physical, logical, default, component[, componentflags]) 

to

class msilib.Directory(database, cab, basedir, physical, logical, default[, componentflags]) 

'conponent' is neither in the doc string or the explanation of the signature.

Nonexistent parameter removed from the doc in r87489 and following.