diff options
| author | hallgren <hallgren@chalmers.se> | 2011-10-12 17:03:54 +0000 |
|---|---|---|
| committer | hallgren <hallgren@chalmers.se> | 2011-10-12 17:03:54 +0000 |
| commit | 44d1a5a9f71b03d9aceeccd760a63fcdc45f8bad (patch) | |
| tree | d51076a708997d6f1af6ac0deefd535bbc25f804 /src/editor/simple/about.html | |
| parent | 0aba45560d2033c37c3d2e876e6f3ef89e1554d6 (diff) | |
Improvements of "gf -server" mode and related setup
"gf -server" mode now contains everything needed to run the minibar and
the grammar editor (including example-based grammar writing).
The Setup.hs script installs the required files where gf -server can find them.
These files have been moved to a new directory: src/www.
The separate server program pgf-http is now obsolete.
Diffstat (limited to 'src/editor/simple/about.html')
| -rw-r--r-- | src/editor/simple/about.html | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/src/editor/simple/about.html b/src/editor/simple/about.html deleted file mode 100644 index 8660621a3..000000000 --- a/src/editor/simple/about.html +++ /dev/null @@ -1,243 +0,0 @@ -<!DOCTYPE HTML> -<html> -<head> -<title>About: GF online editor for simple multilingual grammars</title> -<link rel="stylesheet" type="text/css" href="editor.css" title="Cloud"> -<link rel="alternate stylesheet" type="text/css" href="molto.css" title="MOLTO"> - -<link rel=author href="http://www.cse.chalmers.se/~hallgren/" title="Thomas Hallgren"> - -<meta name = "viewport" content = "width = device-width"> -<meta http-equiv="Content-type" content="text/html;charset=UTF-8"> -<meta charset="UTF-8"> - -<script type="text/javascript" src="slideshow.js"></script> - -</head> - -<body> -<h1>GF online editor for simple multilingual grammars</h1> - -<div class=right> - <div class=slideshow> - <img onload="start_slideshow(this,{delay:5,fade:0.3})" src="P/w1s.jpg" alt="[GF online editor screen shoot]"> - <img class=hidden src="P/w2s.jpg" alt="[GF online editor screen shoot]"> - <img class=hidden src="P/w3s.jpg" alt="[GF online editor screen shoot]"> - <img class=hidden src="P/w4s.jpg" alt="[GF online editor screen shoot]"> - </div> -</div> -<h2>Introduction</h2> - -Traditionally, <a href="http://www.grammaticalframework.org/">GF</a> -grammars are created in a text editor and tested in the -GF shell. Text editors know very little (if anything) about the syntax of -GF grammars, and thus provide little guidance for novice GF users. Also, the -grammar author has to download and install the GF software on his/her own -computer. - -<p> -In contrast, the -<a href="."><em>GF online editor for simple multilingual grammars</em></a> -is available online, making it easier to get started. All that -is needed is a reasonably modern web browser. Even Android and iOS devices -can be used. -<p> -The editor -also guides the grammar author by showing a skeleton grammar file and -hinting how the parts should be filled in. When a new part is added to the -grammar, it is immediately checked for errors. - -<p> -Editing operations are accessed by clicking on editing symbols embedded -in the grammar display: -<span class=more>+</span>=Add an item, -<span class=delete>×</span>=Delete an item, -<span class=edit>%</span>=Edit an item. -These are revealed when hovering over items. On touch devices, hovering is -in some cases simulated by tapping, but there is also a button at the bottom -of the display to "Enable editing on touch devices" that reveals all editing -symbols. - -<p> -In spite of its name, the editor runs entierly in the web -browser, so once you have opened the web page, you can -<strong>continue editing</strong> grammars even while you are -<strong>offline</strong>. - -<h3>Current status</h3> - -<p> -At the moment, the editor supports only a small subset of the GF grammar -notation. -Proper error checking is done for abstract syntax, but not (yet) for concrete -syntax. - -<p> -The grammars created with this editor always consists of one file for the -abstract syntax, and one file for each concrete syntax. - -<h4>Abstract syntax</h4> - -The supported abstract syntax corresponds to context-free grammars -(no dependent types). The definition of an abstract syntax is limited to -<ul> - <li>a list of <em>category names</em>, - <var>Cat<sub>1</sub></var> ; ... ; <var>Cat<sub>n</sub></var>, - <li>a list of <em>functions</em> of the form - <var>Fun</var> : <var>Cat<sub>1</sub></var> -> ... -> - <var>Cat<sub>n</sub></var>, - <li>and a <em>start category</em>. -</ul> - -Available editing operations: -<ul> - <li>Categories can be added, removed and renamed. When renaming a category, - occurences of it in function types will be updated accordingly. - <li>Functions can be added, removed and edited. Concrete syntaxes are updated - to reflect changes. - <li>Functions can be reordered using drag-and-drop. -</ul> - -Error checks: - -<ul> - <li>Syntactically incorrect function definitions are refused. - <li>Semantic problem such as duplicated definitions or references to - undefined categories, are highlighted. -</ul> - -<h4>Concrete syntax</h4> - -At the moment, the concrete syntax for a language <var>L</var> is limited to -<ul> - <li>opening the Resource Grammar Library modules - <code>Syntax</code><var>L</var> and <code>Paradigms</code><var>L</var>, - <code>Lexicon</code><var>L</var> and <code>Extra</code><var>L</var>, - <li><em>linearization types</em> for the categories in the abstract syntax, - <li><em>linearizations</em> for the functions in the abstract syntax, - <li><em>parameter type definitions</em>, - <var>P</var> = <var>C<sub>1</sub></var> | ... |<var>C<sub>n</sub></var>, - <li>and <em>operation definitions</em>, <var>op</var> = <var>expr</var>, - <var>op</var> : <var>type</var> = <var>expr</var>, -</ul> - -Available editing operations: -<ul> - <li>The LHSs of the linearization types and linearizations are determined by - the abstract syntax and do not need to be entered manually. - The RHSs can - be edited. - <li>Parameter types can be added, removed and edited. - <li>Operation definitons can be added, removed and edited. - <li>Definitions can be reordered (using drag-and-drop) -</ul> -Also, - -<ul> - <li>When a new concrete syntax is added to the grammar, a copy of the - currently open concrete syntax is created, since copying and modifying - is usually easier than creating something new from scratch. - (If the abstract syntax is currently open, the new conrete syntax will - start out empty.) - <li>When adding a new concrete syntax, you normally pick one of the supported - languages from a list. The language code and the file name is determined - automatically. But you can also pick <em>Other</em> from the list and change - the language code afterwards to add a concrete syntax for a language - that is not in the list. -</ul> - -Error checks: -<ul> - <li>The RHSs in the concrete syntax are checked - for syntactic correctness by the editor as they are entered. - (TODO: the syntax of parameter types is not check at the moment.) - <li>Duplicated definitions are highlighted. Checks for other - semantic errors are delayed until the grammar is compiled. -</ul> - -<h3>Compiling and testing grammars</h3> - -When pressing the <strong>Compile</strong> button, the grammar will be compiled -with GF, and any errors not detected by the editor will be reported. -If the grammar is free from errors the user can then -test the grammar by clicking on links to the online GF shell, the Minibar or -the Translation Quiz. - -<h3><img class=right src="P/1307545089_weather_04.png" alt=""> -<img class=right src="P/1306856253_weather_06.png" alt="">Grammars in the -cloud</h3> - -While the editor normally stores grammars locally in the browser, it is also -possible to store grammars in the cloud. Grammars can be stored in the cloud -just for backup, or to make them accessible from multiple devices. - -<p> -There is no automatic synchronization between local grammars and the cloud. -Instead, the user should press -<img src="P/1306856253_weather_06.png" alt="[Cloud Upload]"> -to upload the grammars to the cloud, and press -<img src="P/1307545089_weather_04.png" alt="[Cloud download]"> -to download grammars from the cloud. In both cases, complete grammars -are copied and older versions at the destination will be overwritten. -When a grammar is deleted, both the local copy and the copy in the cloud -is deleted. - -<p> -Each device is initially assigned to its own unique cloud. Each device can thus -have its own set of grammars that are not available on other devices. It is -also possible to merge clouds and share a common set of grammars between -multiple devices: when uploading grammars to the cloud, a link to this grammar -cloud appears. Accessing this link from another device will cause the clouds of -the two devices to be merged. After this, grammars uploaded from one of the -devices can be downloaded on the other devices. Any number devices can join the -same grammar cloud in this way. - -<p> -<strong>Note</strong> that while it is possible to copy grammars between -multiple devices, there is no way to merge concurrent edits from multiple -devices. If the same grammar is uploaded to the -cloud from multiple devices, the last upload wins. Thus the current -implementation is suitable for a single user switching between different -devices, but not recommended for sharing grammars between multiple users. - -<p> -Also <strong>note</strong> that each grammar is assigned a unique identity -when it is first created. Renaming a grammar does not change its identity. -This means that name changes are propagated between devices like other changes. - -<h3>Example-based grammar writing</h3> - -This is work in progress... - -<h3>Future work</h3> - -This prototype gives an idea of how a web based GF grammar editor could work. -While this editor is implemented in JavaScript and runs in the web browser, -we do not expect to create a full implementation of GF that runs in the -web browser, but let the editor communicate with a server running GF. -<p> -By developing a GF server with an appropriate API, it should -be possible to extend the editor to support a larger fragment of GF, -to do proper error checking and make more of the existing GF shell functionality -accessible directly from the editor. -<p> -The current grammar cloud service is very primitive. In particular, it is not -suitable for multiple users developing a grammar in collaboration. - -<h3>Related documents</h3> -<ul> - <li><a href="http://www.grammaticalframework.org/~hallgren/Talks/GF/gf-ide.html">GF Grammar Development Tools</a>. Slides from a presentation at the MOLTO meeting in Göteborg, March 2011. - <li><a href="http://www.grammaticalframework.org/grammar-ide/">The GF Grammar IDE</a>. MOLTO deliverable. - <li><a href="http://www.grammaticalframework.org/compiler-api">The GF Grammar - Compiler API</a>. MOLTO deliverable. -</ul> - -<hr> -<div class=modtime><small> -<!-- hhmts start --> Last modified: Fri Oct 7 14:06:14 CEST 2011 <!-- hhmts end --> - </small></div> -<address> -<a href="http://www.cse.chalmers.se/~hallgren/">TH</a> -<img src="http://www.altocumulus.org/~hallgren/online.cgi?icon" alt=""> -</address> -</body> </html> |