InvisibleXML Logo jωInvisibleXML Logo processor - HELP

A SaxonJS/JavaScript processor of Invisible XML - Version 0.9.5



This processor runs entirely within the browser client, using SaxonJS as the top-level program and the jwiXML JavaScript library. There is no server-side processing, apart from initial delivery of necessary files.

You can input and edit an iXML grammar either ab initio or by loading from a file on your computer or one of the test-case or sample grammars from the iXML GitHub repository. The input string can also be edited or loaded from file or, in the case of a test-case or sample grammar, by selecting from one of a number of provided input strings.

Editing grammars and inputs

iXML grammars are edited in the upper text-area,
where usual keystokes are supported,
but there is no 'syntax awareness':

Input strings to be parsed by that grammar are edited in the lower text-area:

Parsing an input against a grammar

With the grammar and potential input string editied, clicking on the GO! button causes the following actions:

Parsing and compiling the grammar

The grammar defined by the text in the Grammar window is parsed and compiled as an iXML grammar to produce an internal object representing the compiled grammar. Assuming the grammar has valid iXML syntax, this is then displayed in the 'Parse Grammar' section, where various projections of the grammar can be displayed either in XML format or an iXML textual serialisation. Either the original parsed grammar or the compilation (i.e. where the grammar has been reduced to a canonical form) thereof can be shown.:

If you want to copy the parsed XML-format grammar the 'select grammar' button will select the whole of the grammar XML, so a simple 'Copy' keystroke action can get it into the clipboard as text.

Parsing the input string against the grammar

Assuming the grammar has compiled and the input text string is not empty (or the 'Allow an empty string as input' option is checked), the text string is then parsed against the grammar, giving results in the Results section.

Loading grammars and inputs from external sources

Both grammar and input texts can be read from local filestore by using the appropriate 'Choose file' (or 'Browse') button, which permits a file to be read and its text loaded into the textarea.

Grammars can also be loaded from web-repositories, in particular from the InvisibleXML test-suites or sample grammars using the Grammar 'Test/sample' dropdown:

A browsable catalog of the test suite is also available.

When there are sample inputs available for one of these test or sample grammars, the 'Test/Sample' dropdown above the Input textarea will be populated.