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authoraarne <aarne@chalmers.se>2010-12-22 14:08:42 +0000
committeraarne <aarne@chalmers.se>2010-12-22 14:08:42 +0000
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-GF 3.0
-Krasimir Angelov, Björn Bringert, and Aarne Ranta
-Beta release, 27 June 2008
-
-
-GF Version 3.0 is a major revision of GF. The source language is a superset of the
-language in 2.9, which means backward compatibility. But the target languages, the
-compiler implementation, and the functionalities (e.g. the shell) have undergone
-radical changes.
-
-
-==New features==
-
-Here is a summary of the main novelties visible to the user:
-- **Size**: the source code and the executable binary size have gone
- down to about the half of 2.9.
-- **Portability**: the new back end format PGF (Portable Grammar Format) is
- much simpler than the old GFC format, and therefore easier to port to new
- platforms.
-- **Multilingual web page support**: as an example of portability, GF 3.0 provides a
- compiler from PGF to JavaScript. There are also JavaScript libraries for creating
- translators and syntax editors as client-side web applications.
-- **Incremental parsing**: there is a possibility of word completion when
- input strings are sent to the parser.
-- **Application programmer's interfaces**: both source-GF and PGF formats,
- the shell, and the compiler are accessible via high-level APIs.
-- **Resource library version 1.4**: more coverage, more languages; some of
- the new GF language features are exploited.
-- **Uniform character encoding**: UTF8 in generated files, user-definable in
- source files
-
-
-==Non-supported features==
-
-There are some features of GF 2.9 that will //not// work in the 3.0 beta release.
-- Java Editor GUI: we now see the JavaScript editor as the main form of
- syntax editing.
-- Pre-module multi-file grammar format: the grammar format of GF before version 2.0
- is still not yet supported.
-- Context-free and EBNF input grammar formats.
-- Probabilistic GF grammars.
-- Some output formats: LBNF.
-- Some GF shell commands: while the main ones will be supported with their familiar
- syntax and options, some old commands have not been included. The GF shell
- command ``help -changes`` gives the actual list.
-
-
-Users who want to have these features are welcome to contact us,
-and even more welcome to contribute code that restores them!
-
-
-==GF language extensions==
-
-Operations for defining patterns.
-
-Inheritance of overload groups.
-
-