Before we start talking about XML and databases, we need to answer a question that occurs to many people: "Is XML a database?" An XML document is a database only in the strictest sense of the term. In many ways, this makes it no different from any other file -- after all, all files contain data of some sort. For example, it is self-describing (the markup describes the structure and type names of the data, although not the semantics), it is portable (Unicode), and it can describe data in tree or graph structures. For example, it is verbose and access to the data is slow due to parsing and text conversion.It describes how the differences between data-centric and document-centric documents affect their usage with databases, how XML is commonly used with relational databases, and what native XML databases are and when to use them.NOTE: Although the information discussed in this paper is (mostly) up-to-date, the idea that the world of XML and databases can be seen through the data-centric/document-centric divide is somewhat dated.When finished, these will bring namespaces, linking, schemas, stylesheets, and more to the table.
The DTD is retrieved automatically based on the DOCTYPE of the parsed document.
) - Select node from the tree popup didn't work - Error icon overrided the tab icon - Locked/Unlocked state editor refresh fixed for the toolbar usage - XML Formatting could bug with tags in comment inside the document header - XML Formatting could bug with ", ' entities in text - Location by line fixed - Focus lost when checking a document - xml:space = 'preserve' or 'default' are managed while formatting - Error keys selection (ctrl shift up/ctrl shift down) changed to alt down/alt up - New preference [editors/editor/max Error Lines] for changing the default error panel size - New preference [xml/xmlconfig/XML Instance with all attributes] for generating XML instance from XSD Schema - Improved W3C Schema Generation from an XML instance Filter - Automatic Activation is taken into account when changing XPath expression - CDATA section are managed XSLT Editor - xsl:text with inner white spaces are preserved while formatting XSD Editor - Enumerations are taken into account while generating an HTML documentation - Open/close states for nodes are preserved Bugs fixed - CDATA lose with the filter editor - Permanent Tooltip while editing fixed - New font name by a preference wasn't taken into account for editing - Check All action fixed - New Filter for editing easily any parts of a document - SQL import with ODBC access by default - Load and use your own JDBC data driver for any relational databases - New Style library panel for managing CSS style from HTML, XSL-FO, CSS documents - New Expand Action for the editor tree popup - CSV import option for converting column names to elements, add row numbers - New Preference for changing the cursor color - Text Antialiasing is enabled by default (preference application/interface/antialiasing) - Engine Updates for inner XML libraries (XML, XSLT, XSL-FO) XSD Editor - New matching search for element ref, complexe and simple type from the contextual menu XSLT Editor - New toolbar for managing templates - Copy / Cut / Paste of templates from multiple documents - New edit action for the Data and Result file - New clean action for the result file - New matching search for template,apply-templates,call-template from the contextual menu XSL-FO Editor - New matching search for page-sequence and master-page from the contextual menu Relax NG Editor - New matching search for references and define blocks from the contextual menu Bugs fixed - Drag'n drop could create wrong occurence number for the snippets - Drag'n drop of templates in the XSLT editor pane fixed - Tooltip with xpath ( mouse ctrl key ), list of attributes ( mouse alt key ) - Enter key is managed when changing a name in the element view - New shortcuts ctrl shift down or up for moving to the previous or the next sibling node - New shortcuts ctrl page down or page up for moving to the parent of the first child node - Multiple file edition for including/importing parts - Templates manager for attributes, inserting, moving a template - XSLT Debugger works with including/importing xslt files - The current context XML node is automatically displayed when debugging - Maximized state when opening from the most recent menu - When debugging in a visual maximized state the debugging window is shown - Drag'n drop from the XML data source to the XSLT editor fixed - Parsing error with particular CDATA content January, the 08 th 2010 Version : 2010 Build : 020110 XML Form Designer - Complete Designer for building Form for your XML documents - Drag 'n drop from an XML Schema parts for building your Form - Synthronization between the schema nodes and the form fields.
- Component library for adding special effect (label, separator...) - Control for required fields and various constraints (multi lines...) - XPath synchronization system XML Form Editor - Edit your favorite XML document with an XML Form - Actions for adding and deleting sequence part - Switch between the Form and the Source Editor Text Editor - Location bar for navigating into the node hierarchy (go to, select, copy, cut actions popup) - Current line location - Whitespaces visibility Bugs fixed - popups for Mac OS X fixed (Project panel and XSD visual editor) - Some dialog layouts for Mac OS X fixed - Due to wrong performance, the XHTML inner preview has been removed (system preview must be used) July, the 21 th 2009 Version : Service Pack 1 Build : 210709 Download now Project - Relative paths (preference application/project/relative Path for disabling it) - Drag'n Drop starts slowly avoiding moving by error a project branch - Delete key for removing a project element - Filter by document type (menu Popup) XML Tree - Drag'n drop of nodes takes into account auto-closed elements - Ctrl key while dragging for duplicating the nodes - Drag'n drop from the tree to the editor for copying a node - Popup on a node for displaying another attribute Editor - Cursor location is restored after formatting - Expression highlighting (parenthesis...) Interface - "Close all except the current one" action XSD Editor - The attribute view is by default optional (delimiters in the border) - The group ref view is minimized - New export image action ( png or jpg ) in the designer - Delete key in the visual mode is managed XSLT Editor - The document type (XSLT 1.0 or 2.0) is now displayed in the XSLT window Doc Book - HTML help output is managed - Doc Book properties are available Bugs fixed - XML catalog management fixed - Couldn't parse an XML document with both a DTD and a schema - Color of the '=' character could not be changed - Formatting with text trimming could remove line breaks - Couldn't add element in the visual mode for extension fixed - Error message whenimporting a project for opened items - The recent files (document and projects) are stored in the user home (so will be unchanged with new editix versions) - Invalid recent files are in red inside the file menu - Better preferences organization - Alt-left/Alt-right for navigating into the selected editors - Wrong default path for the filebrowser wasn't notified - Fix the "No stylesheet" message for Doc Book transformation - Fix the change message after a Doc Book transformation - Fix the Search/Replace - Fix the Comment/Uncomment action - Fix Diff with DTD - The first error is selected automatically when parsing - Keyboard shortcuts : ctrl-shift-up and ctrl-shift-down for navigating into the errors - "Ctrl down/up" shortcuts keyboard for selecting the next or the previous node in the text editor - Search/Replace performance fixed - XSLT2 validator - Couldn't insert characters before the root node - The XPath1 functions assistant for XSLT1 didn't display specific XSLT functions - "Repeat the last action" works both for XSLT and XQuery - XPath1/XPath2 functions assistant for XSLT1/XSLT2 (ctrl-space) - Wrong properties are notified June, the 19 th 2008 Version : Service Pack 4 News Common : - New XQuery Editor - XML instance generated from a W3C schema or a DTD - New CSS Editor - Assistant for W3C Schema type boolean,date Time,time,date,g Year Month,g Year,g Month Day,g Day,g Month - Syntax highlighting for XPath and XQuery - W3C Schema Annotation managed for the content assistant - A document with error is notified inside its tab Bugs fixed : - When choosing FOP for XSLT, the result document was displayed as any texts - Formatting error with CDATA section fixed - When clicking on an error message, the editor didn't scroll to the bound line - When highlighting a line from the tree, some parts were wrongly refreshed - BOM for UTF-8 was wrongly managed - Formatting error fixed with a document without a prolog - Previous/Next actions didn't work sometimes - Several content assistant problems fixed - Starting Editix with a file path didn't work - The schema generator throwed an error April, the 30 th 2008 Version : Service Pack 3 Build : 300508 News Common : - XML Snippets : It helps you reusing XML blocks - Use Drag'n Drop for putting a snippet into your document or Double click.
The number of applications currently being developed that are based on, or make use of, XML documents is truly amazing (particularly when you consider that XML is not yet a year old)! SGML is the Standard Generalized Markup Language defined by ISO 8879.
For our purposes, the word "document" refers not only to traditional documents, like this one, but also to the myriad of other XML "data formats". SGML has been the standard, vendor-independent way to maintain repositories of structured documentation for more than a decade, but it is not well suited to serving documents over the web (for a number of technical reasons beyond the scope of this article).
At the time this paper was originally written (1999), it was a convenient metaphor for introducing native XML databases, which were then not widely understood, even in the database community.