Stability of book URLs

[Max Bowsher]

Ben Collins-Sussman wrote:
> On Apr 21, 2005, at 10:54 AM, Max Bowsher wrote:
>> 
>> Basically, I'm thinking that section numbers absolutely *are* going to
>> change, and chapters might too, so we had must adopt a scheme that
>> doesn't break when that happens.
>> 
> 
> I'm getting smacked by this problem right now.  I try to add a new
> section, and then have to renumber all the subsequent sibling sections.
>  And then I worry about xref's that are now pointing to valid -- but
> incorrect -- section numbers.

Yep. I've checked, and fixed in r1235.

> We really should give our sections id's that are descriptive, like
> "ch-4-using-branches", rather than "ch-4-sect-2.3", so that we have
> some freedom to rearrange sections, insert new ones, etc.

Are even chapter numbers immutable?

Max.