The new version of Chronos for Squeak, unlike the version initially
published, can be safely installed by file-in.  Also unlike the initial
version, it can read reference data from the file system--especially
including time zone rulesets. It can also persist reference data in the
local file system. The Chronos Time Zone Compiler can be installed, and it
can be used to compile Chronos time zone rule files from the Olson zoneinfo
source files.
 
However, the current Squeak version still does not have all the
functionality of the VisualWorks version.  Here's what's still missing:
 
* Determination of the host system time zone (this would require new
primitives or FFI function libraries--and is something that is not at all on
my to-do list)
 
* Support for any Locale other than #en_US--I may (or may not) decide to use
the data published by the Common Locale Data Repository (CLDR) Project to
provide such functionality for Squeak (and for other Smalltalk
implementations as well,) but that won't happen for many months yet, if it
happens at all [ref: http://www.unicode.org/cldr/]
 
* Convenience methods implemented in Squeak classes that leverage Chronos
(e.g., String>>asTimezone, Number>>hours, etc.)--the issue here, of course,
is interference with the native Chronology library's own such convenience
methods (Note: Implementing such convenience methods for Chronos is the sole
responsibility of the Squeak community)
 
* Type-compatibility of Chronos classes with the analogous Chronology
classes (Note: Implementing such type-compatibility methods for Chronos (or
Chronos-compatibility for Chronology, for that matter) is the sole
responsibility of the Squeak community)
 

For full details, including installation instructions, see:
<http://chronos-st.blogspot.com/2006/03/squeak-version-of-chronos-published.
html>
http://chronos-st.blogspot.com/2006/03/squeak-version-of-chronos-published.h
tml
 
--Alan
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