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Metacat is a flexible metadata database. It utilizes XML as a common syntax for representing the large number of metadata content standards that are relevant to ecology. Thus, Metacat is a generic XML database that allows storage, query, and retrieval of arbitrary XML documents without prior knowledge of the XML schema.
The Metacat database models XML documents as a DOM tree, basically decomposing the nodes of the XML document and storing the node data as a series of records in a relational database via a JDBC connection. At this point, only Oracle and PostgreSQL have been tested as a backend databases, but we have avoided RDBMS specific features in order to maintain portability to other relational databases.
Metacat is implemented as a Java Servlet, and so communicates using basic HTTP protocol semantics. The figure below shows the basic structure of the Metacat architecture. A well defined interface for inserting, updating, deleting, querying, and transforming (using XSL) XML documents is presented. We would like to add the DOM API as an alternative supported mechanism for interacting with Metacat, but have not yet implemented this functionality.
From the website:
XML::Generator::PerlData provides a simple way to generate SAX2 events from nested Perl data structures, while providing finer-grained control over the resulting document streams.
Processing comes in two flavors: Simple Style and Stream Style:
In a nutshell, 'simple style' is best used for those cases where you have a a single Perl data structure that you want to convert to XML as quickly and painlessly as possible. 'Stream style' is more useful for cases where you are receiving chunks of data (like from a DBI handle) and you want to process those chunks as they appear. See PROCESSING METHODS for more info about how each style works.
FormFacesTM is a pure JavaScript solution that utilizes AJAX techniques and can be seamlessly integrated with AJAX applications. This means that XForms+HTML can be sent directly to the browser where JavaScript transcodes the XForms controls to HTML form controls and processes the binding directly within the browser - requiring ZERO server-side processing and ZERO plug-ins.
The FormFacesTM JavaScript is compatible with browsers that implement XHTML 1.0, ECMA-262 3rd Edition, and DOM Level 2 which includes Internet Explorer, Netscape, Mozilla, FireFox, Opera, Konquerer, Safari, and NetFront.
<oXygen/> XML Editor & XSLT Debugger
The simple and elegant look of the <oXygen/> combined with the complete coverage of the XML editing features have made it popular in both the corporate and academic worlds. It provides the necessary tools for the document creation and presentation.
The documents can be created and validated against any user defined schema. The smart context sensitive editing saves time and guarantees a minimum number of validation errors. The documents can be published in a wide range of formats including HTML, PDF, PostScript using the built-in or external processors. Developers can use <oXygen/> for authoring document schemas and for editing and debugging the XSL stylesheets needed for the presentation layer. The integration with the document repositories is made through the WebDAV and FTP protocols.
Asynchronous JavaScript and XML, or Ajax, is a web development technique for creating interactive web applications using a combination of:
- HTML (or XHTML) and CSS for presenting information
- The Document Object Model manipulated through JavaScript to dynamically display and interact with the information presented
- The XMLHttpRequest object to exchange data asynchronously with the web server. (XML is commonly used, although any format will work, including preformatted HTML, plain text, JSON and even EBML)
tagged ajax javascript xml by winkler4 ...on 09-OCT-05
Mike already tagged this one, but it's quite fascinating so I thought I'd tag it again. So, if this does what I think it does, we could export bookmarks from delicious --> tagit and vice versa. Which would be so cool.