== The Synt parser ==
The '''Synt''' is a tool for automatic syntactic analysis designed for morphologically-rich languages, primarily Czech and Slovak. Synt parser is based on a context-free backbone enhanced with contextual actions and performs a stochastic agenda-based head-driven chart analysis. The input for Synt parser is morphologically annotated sentence in vertical form. The output of Synt parser are: a phrase-structure tree, a dependency graph and a set of syntactic structures.

== Downloads ==

A development version can be downloaded here: ​http://nlp.fi.muni.cz/projekty/synt/synt.tar.xz

== Licensing ==

SYNT is distributed under the ​GPLv3 license.

== Contact ==
Drop a mail to [mailto:synt@aurora.fi.muni.cz]

== Input ==
The input for Synt parser is morphologically annotated sentence in [vertical,http://nlp.fi.muni.cz/trac/synt/wiki/input] form or [brief,http://nlp.fi.muni.cz/trac/synt/wiki/input].

== Synt grammar specification ==
The Synt parser uses a meta-grammar concept: to face maintenance and development issues of a wide-coverage grammar, a full grammar is automatically generated from a (hand-written) meta-grammar. Synt parser is based on a context-free backbone enhanced with contextual actions and performs a stochastic agenda-based head-driven chart analysis.

See [MetaGrammar full meta-grammar documentation]

== Synt output ==

See possible outputs here: https://nlp.fi.muni.cz/trac/synt/wiki/output

=== Phrase-structure tree ===

[[Image(tree.svg)]]

=== Dependency graph ===

[[Image(graph.png)]]

=== Syntactic structure ===
An unambiguous optimal decomposition of the input sentence into a set of syntactic structures that are required by the user. 

{{{
Sentence: Tlačil auto, ktoré sa pokazilo.
[0-7) : Tlačil      auto,
        tlačiť - V  auto - N
[2-4) : ktoré          sa           pokazilo
        ktorý - PRON   byť - PRON   pokaziť - V
}}}

Where '''[2-4)''' means interval of word indexes of interest. The words after the interval (ktoré sa pokazilo) are words from the sentence. And the words under the interval are lemmas of given words from sentence and abbreviation after the lemmas are part of speech.


== Usage ==

The input for Synt parser is a morphological annotated sentence either in vertical (word-per-line) or brief format (which allows ambiguous morphological input).
Multiple sentences are separated by a blank line. 

To provide basic syntactic analysis:

{{{
cat sentence.vert | synt -i vertical
cat sentence.brief | synt -i brief
}}}

To provide syntactic analysis with phrase-structure tree output:

{{{
cat sentence.vert | synt -i vertical -tt-
}}}