[tz] Is there a high-level conversion process description available?

David Patte dpatte at relativedata.com
Mon Oct 24 13:02:17 UTC 2011

Since you mention the page tz-link.htm, is there a plan to put the 
latest version online somewhere? The version you quote (8.15) is about 
10 versions old.

On 2011-10-24 5:23, Alois Treindl wrote:
> While zic is the official converter of the textual tzdata files, there 
> exists a variety of independent implementations which read and process 
> the tzdata files.
> You find a list of tz compilers in Paul Eggert's info page 
> http://www.twinsun.com/tz/tz-link.htm
> I would assume that by studying their source code you will be able to 
> learn what you need to know.
> Personally, I would not recommend of writing yet another tz compiler. 
> Reading and processing the binary files created by zic seems to me a 
> much cleaner and more reliable approach.
> On 23.10.11 23:01, Willy at willylorenzo.com wrote:
>> I know nothing about Unix or the c/c++/java languages so I know have
>> a steep learning curve if I want to understand the existing tz
>> code...but I’m hoping that if I can understand the zone conversion
>> process then I can write the necessary code.   I’ve got the nearly
>> 5300 lines of rules, zones, leaps, and links stored in a Notes db for
>> easier manipulation, and I can take a zone UNTIL or a rule and year
>> and produce a date from it.  So it’s a start.

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