Version 17 contains major new improvements:

New support for AMP HTML documents
Improved and updated support for HTML5
Improved and updated support for CSS3
Easy validation of the DOM using Firefox and the Easy Copy Add-on and the new cseclip tag
Miscellaneous bug fixes
Many other improvements, updates, and refinements
Upgrade to v17 and get all future v17 updates for free

Tip: To update, use the Help->Check for Updates option in the editor.

What's New in CSE HTML Validator

Version 17.04 Version 17.04 is now available.

Version 17.04 (17.0400) - MINOR UPDATE - (released 2017-08-08)

Editor: Fixed a stack overflow issue that could cause a program crash when editing files with very long lines and syntax highlighting is enabled
Editor: New 'Max documents open before switching to single-line tabs' editor option in the Document Tabs options page
Batch Wizard: New Target List option (in the Advanced tab) to ignore all query strings when following links
Batch Wizard: The Flags column now shows the flags in expanded form that is easier to read (for example, 'URL' instead of 'U' and 'Follow Links' instead of 'L')
Validator: New Security Messages options page in the Validator Engine Options
Validator: Added some additional security checks especially for HTTP headers (if available) when security messages are enabled
Validator: More messages now have a shorter version when the 'extended messages' option is not enabled
Validator: Updated list of top-level domains
Validator: Fixed a rare parsing bug that could result in several exceptions
Validator: New  comment to put into HTML documents that you don't want to validate (handy for Batch Wizard jobs)
Validator: New  comment to specify words to ignore in a document when spell checking
Validator: Updates to recognized form control attributes, global event attributes, and body event attributes
New TNPL function: $var.countStringsNoCase()
Improved TNPL function: MessageEx() (flag 0x2000000)
Other miscellaneous improvements, updates, and bug fixes

Version 17.03 (17.0300) - MINOR UPDATE - (released 2017-06-02)

Editor: Improvements to how the integrated web browser works, including a fix for an issue that may cause the HTML source not to display
Editor: Improved handling of 50 or more opened documents: Now shows the Open Documents Window if over 50 documents are open (up to once per run) and potentially displays a tip (if using multi-line document tabs and the Open Documents Window is not open)
Batch Wizard: Resolved some issues when running multiple instances to process multiple Batch Wizard jobs simultaneously
Batch Wizard: Fixed handling of BOMs
Validator: Improved checking and handling of CSS calc() and var() functions
Validator: Fixed rare CSS parser bug
Command Line Processor: Fixed a bug that could cause cmdlineprocessor.exe to generate output in the wrong format in some cases
Improved TNPL function: hasAttForStartTag()
Other miscellaneous improvements, updates, and bug fixes

Version 17.02 (17.0200) - MINOR UPDATE - (released 2017-03-16)

Editor: New options when right-clicking on an absolute http or https link: Copy Link and Open Link
Editor: Improved behavior when using the integrated web browser to preview documents
Improved encoding checking. For example, trying to open a UTF-8 document with improper encoding should generate a new dialog message.
Validator: Significant updates to WAI-ARIA accessibility checking
Validator: Miscellaneous updates and improvements to document checking and the validator messages
New TNPL function: onStartTagCantUseHere()
Improved some TNPL functions including (but not limited to): checkStringEx(), getMessageCategory(), runProgram()
Some minor performance tweaks to improve performance
Updated various components including JSLint (to 2017-03-13), HTML Tidy (to 5.4.0), Node.js (to 6.10.0) and more
Other miscellaneous improvements, updates, and bug fixes

Version 17.01 (17.0100) - MINOR UPDATE - (released 2017-01-20)

Editor: Split view is back (F10)
Editor: New 'Check for Unicode Normalization Form C (NFC)' option in the Validator Engine Options and new editor option to normalize the selected text
Editor: The Message Window now highlights URLs which can be clicked on (while holding down the Ctrl key) to open the URL
Validator: Fixed possible JSON crash bug and improved JSON syntax checker to detect duplicate key names
Validator: Improved handling and checking of data: URIs
Validator: Updated list of recognized fonts
Improved some TNPL functions
High DPI support is back
Other miscellaneous improvements, updates, and bug fixes

Version 17.00 (17.0000) - MAJOR NEW RELEASE - (released 2016-11-16)

Editor: New Options->Validator Engine Options->Default Validation Mode menu to select a default validation mode that applies to all documents unless overridden on an individual document basis. Also accessible from the Options drop down menu on the main toolbar (if visible).
Editor: Smarter opening of files with an unrecognized file extension
Editor: GUI tweaks and bug fixes
HTML Validator: Added support for AMP Validation (Accelerated Mobile Pages) and document checking
HTML Validator: Many miscellaneous updates, improvements, and additional checks, including (but not limited to):
- If schema.org based structured data is detected in a script element then CSE HTML Validator attempts to extract link data for link checking and text data for spell checking
- Added support for the integrity and referrerpolicy attributes
- Added new checks for the value of the pattern attribute
- Added new checks for scripts of type "application/ld+json"
- Improved handling of character references and added a new 'Strict ampersand encoding' option to the Validator Engine Options (Char References page)
- Improved Twitter Card checking
- Improved meta tag checking
- Updated list of recognized Unicode code points
- Updated meta viewport checking
- Updated autocomplete support
- Updated list of user agent strings to choose from when opening documents from the web
HTML Validator: New (JSON) attribute value in the Configuration Editor for values that should be JSON
CSS Validator: Many miscellaneous updates, improvements, and additional checks
Link Checker: Improved Internet media type checking
TNPL scripting language now supports if ... elseif, significantly improving code structure in certain cases
New TNPL functions & more: checkArrayKeys(), checkAttributeValue(), isAMPHTMLTypeDoc, isCurrentParentTagAMPElement, isCurrentParentTagNotAMPElement
Improved TNPL functions: addLink(), checkStringEx(), checkTagContents(), dissect(), MessageEx(), requireAllAttributes(), requireOneAttribute()
Updated HTML Tidy to 5.2.0, JSHint to 2.9.4, JSLint to 2016-10-24, and Node.js to 6.9.1
Other miscellaneous updates

Version 16.05 (16.0500) - MINOR UPDATE - (released 2016-09-06)

This minor update includes miscellaneous updates and bug fixes.

Version 16.04 (16.0403) - MINOR UPDATE - (released 2016-06-06)

Editor: Better handling of tabs when indenting and unindenting and the editor option to use the tab character is enabled
Editor: New URL encoding and decoding menu item options for selected text under the editor's context menu: Selection->Other->URL Decode and Selection->Other->URL Encode
HTML Validator: If the option to include HTML Tidy messages is enabled then HTML Tidy is now automatically disabled for documents that appear to contain server-side script (like PHP) and were not served by a web-server (checking these documents with HTML Tidy is often not useful nor helpful)
HTML Validator: Fixed an encoding problem that could cause improper validation messages from HTML Tidy in some cases
CSS Checker: Added support for CSS variables
CSS Checker: Improved handling and messages when url() is used without quotation marks
CSS Checker: Recognizes many more 'obscure' and proprietary CSS properties
CSS Checker: Recognizes CSS4 color notations #RGBA and #RRGGBBAA (and recommends using a more widely supported color notation)
CSS Checker: Recognizes more CSS4 pseudo-classes and pseudo-elements
Validator: Various message improvements and added checks.
Validator: Can now set the max errors and max warnings using setValueInt() in user functions
Validator: Improved compatibility with old configuration files
Validator: Updated list of recognized rel values including support for rel="preload" and the companion as attribute
Template Tool: New CURRENTDATE2 variable for the Template Tool, which is the same as CURRENTDATE except that all non-ASCII characters are replaced with character references
Other updates, improvements, tweaks, and bug fixes throughout

Version 16.03 (16.0300) - MINOR UPDATE - (released 2016-03-28)

Batch Wizard: Fixed a problem with the progress result line not updating properly for link checking ("Link checking 0.0% complete [121<>407]...").
Batch Wizard: The XML output now provides date and time values in standard XML format.
Editor: The replace shortcut is now Ctrl+H (from Ctrl+R) for a more standard shortcut (although Ctrl+R is still supported for the time being).
Validator: Fixed some problems with JavaScript linting (see this "Validating Scripts" forum post)
Validator: Some refinements and improvements when checking form controls name and for attributes.
Validator: Added some additional checks for documents with a UTF BOM (detects more conflicts with "charset" values).
Validator: Now checks embedded JSON in script elements when type="application/json" or type="application/ld+json"
Validator: New Validator Engine->JSON Checker options page in the Validator Engine Options.
Validator: New TNPL function: checkJSON()
Validator: New TNPL integer: DocSourceFlags
Other updates, improvements, tweaks, and bug fixes throughout

Version 16.02 (16.0200) - MINOR UPDATE - (released 2016-02-08)

Batch Wizard: Ability to customize the message element in XML output (enterprise edition only)
Batch Wizard: New option in the Target List Options tab to specify scripts to add at the end of HTML report pages. By default, the Batch Wizard will now add a script that adds the ability to show or hide each type of message at the top of the report pages. Some minor changes to the structure of the HTML report pages were also made to support this new feature.
Editor: New Save Messages to File submenu to go with the existing Copy Messages to Clipboard submenu in the Results Window context menu; also added CSV (comma separated value) export formats
Editor: Simplified the root context menu of the Results Window
Editor: New Search->Find/replace w/Reverse option to change (reverse) direction and then perform another search or replace operation
Editor: Can now hold down the Shift key while selecting File->Save All to resave all open documents with a specified character encoding
Editor: The integrated web browser is no longer available in beginner mode
Editor: Bug fixed when replacing backwards with confirm and choosing 'No'
CSS Validator: Now recognizes CSS properties: font-smooth, -webkit-font-smoothing, -moz-osx-font-smoothing
Validator: Added some Content Security Policy checks for serialized Content Security Policy strings when found in a meta tag or HTTP header
Validator: New TNPL function: hasHTTPHeader()
Validator: Updates to JSLint, JSHint, and Node.js
Files are now code signed using an sha256 digest algorithm due to Microsoft security policy changes designed to increase security (but also signed with sha1 for backward compatibility)
Other updates, improvements, tweaks, and bug fixes throughout

Version 16.01 (16.0100) - MINOR UPDATE - (released 2015-11-23)

Editor: Improved encoding handling when saving new documents (and now defaults to UTF-8)
Installer: Now asks if you want to uninstall previous versions before installing v16
Validator: Fixed a bug with the 'Require optional end tags' option not working correctly
Validator: Fixed a CSS parser bug with the ~= attribute selector
Validator: Bug fixes and improvements to JavaScript linting with JSLint and JSHint
Validator: New TNPL integer: CurrentParentTagRequiresExplicitEndTag
Other updates, improvements, tweaks, and bug fixes throughout

Version 16.00 (16.0000) - MAJOR NEW RELEASE - (released 2015-10-21)

Batch Wizard: The link reports (for link checking) now include an optional 'Time' column to report the estimated server response time
Batch Wizard: Improvements to the visual appearance of HTML reports
Batch Wizard: Can now generate both HTML and XML reports simultaneously (enterprise edition only because only the enterprise edition supports XML reports)
Batch Wizard: Can now specify a VEO file (validator engine options export file) for each target list
Batch Wizard: Can now specify progress logging levels of minimum, moderate, or maximum message verbosity
Editor: The same interface from previous versions but with some minor tweaks
Editor: New 'Clipboard' options page in the Editor Options that allows CSE HTML Validator to monitor the clipboard for HTML documents
Editor: New Search->Clear Find and/or Replace History option
Editor: Improved encoding handling when saving a newly created files
Editor: Reorganized the new template menu and moved the less-used and deprecated templates to a separate sub-menu
Validator: Many updates and improvements to validator output
Validator: Significantly improved and updated WAI-ARIA accessibility checking
Validator: JSHint is now used as the default JavaScript linting tool due to its reputation as a more practical linting tool
Validator: Updated JSLint to the version that is a major rewrite from the version included with previous versions of CSE HTML Validator
Validator: Updated list of recognized top-level domains
Link Checker: Now measures response time and generates a comment when the response time meets or exceeds the "Slow response time" setting in the Link Checking->More Options page of the Validator Engine Options
Link Checker: Performance improvements for faster link checking
Miscellaneous: Disabled the obsolete and insecure SSLv3 protocol (some secures servers would reject connections when SSLv3 was enabled)
Miscellaneous: Improved TNPL functions: $var.hasValue(), $var.hasValueNoCase()
Miscellaneous: New TNPL functions: sleep(), $var.lastIndex()
Miscellaneous: New TNPL integers: isMessageCombineEnabled, isTagExplicit
Other updates, improvements, tweaks, and bug fixes throughout

Version 15.0600 - MINOR UPDATE FOR v15 - (released 2015-12-31)

Miscellaneous updates, tweaks, and bug fixes
This update is only available for the lite edition (licensed users should use the latest v16 version)

Version 15.0500 - MINOR UPDATE FOR v15 - (released 2015-10-05)

Batch Wizard: Fixes to some reports, especially single-page reports
Editor: Fixed the problem of not deleting temp files in some cases when the integrated web browser was used
Validator: Improved support for the template element
Validator: Fixed some bugs related to tag counting
Miscellaneous updates, tweaks, and bug fixes

Version 15.0400 - MINOR UPDATE FOR v15 - (released 2015-07-30)

Editor: Now limits the Find/Replace dialog strings memory to a maximum of 100 entries; before there was no limit
Miscellaneous updates, tweaks, and bug fixes, including a rare CSS parser bug and a rare HTML parser bug

Version 15.0300 - MINOR UPDATE FOR v15 - (released 2015-05-19)

Batch Wizard: Added 'O' flag for URLs that POST data
Batch Wizard: Fixed the "ITaskBarList3 is not supported on this OS version" message when using Windows Vista
Batch Wizard: Fixed bug that cause the Batch Wizard not to follow local file targets properly
Editor: New editor option in the Results Window page to use a larger font size
Editor: Added new Ctrl+D keyboard shortcut to duplicate the current line
Editor: Fixed an issue that could cause a crash or freeze when closing documents
Editor and Batch Wizard: Option to POST a string when opening a URL in the editor or when adding a URL target to a Batch Wizard target list
Validator: New TNPL keyword values CurrentParentTagNameLine, CurrentParentTagNameLineEx
Validator: Improvements to some validator messages
Validator: Added option to export the user functions file(s) in VEO export files (see this forum post: Changing validator user functions file programmatically)
Command Line Processor: -veofile now works with -b
Pretty Print/Fix tool: Added two new options under the "More Options" menu: "Drop Empty Elements" and "Drop Empty Paragraphs"
Updated Node.js to 0.12.3
Other updates, improvements, and bug fixes throughout

Version 15.0200 - MINOR UPDATE FOR v15 - (released 2015-02-19)

Validator: Major update to HTML Tidy with improved HTML5 support (including the picture element)
Validator: Major update to JSLint for JavaScript linting
Link Checker: New option in the Link Checking page of the Validator Engine Options to treat temporary redirects as OK (defaults to enabled)
Batch Wizard: New event function: onLinkReportAdding()
Batch Wizard: New Advanced tab with an option to disable media type checking
Improved visual quality on high DPI systems; CSE HTML Validator is now "DPI-aware"
Fixed a bug that could cause a program freeze when using path mappings
Other updates, improvements, and bug fixes throughout

Version 15.0100 - MINOR UPDATE FOR v15 - (released 2015-01-07)

Editor: The dynamic help system now recognizes many CSS functions letting you press F1 to open a web page with more information and help links
Editor: The Results Window now displays "No messages here" when there are no messages to show in the Grouped, Accessibility, and Styles tabs.
CSS Validator: Accepts calc() anywhere a <length>, <frequency>, <angle>, <time>, <number>, or <integer> is required. With calc(), you can perform calculations to determine CSS property values.
CSS Validator: Improved syntax checking of many CSS functions
Link Checker: Fixed a link checker bug that treated local folder links as files instead of folders
Batch Wizard: New "Combine similar messages into one message" option (defaults to enabled) in Batch Wizard Options, Report Options->Report Format that can significantly reduce the size of the Batch Wizard reports when there are combinable messages (such as those with the same message ID or text)
Batch Wizard: Fixed a bug that sometimes caused a username and password not to be used when it should have when requesting and link-checking URLs
Fixed a bug with the handling of file URLs with non-ASCII characters
Fixed image size checking that worked in v14 but broke in v15 (also improved image size checking)
Improved proxy server handling; will now automatically use the Windows proxy settings by default (those specified in the Windows Internet Options dialog)
Security improvements to the auto-updater so that it doesn't try to run a file that is not digitally signed
Other updates, improvements, and bug fixes throughout

Version 15.0003 - MINOR UPDATE FOR v15 - (released 2014-11-14)

Batch Wizard: Fixed Taskbar progress bugs
CSS Validator: Fixed parsing problem with CSS comments when used in certain places
Link Checker: Fixed a path calculating bug with documents having Windows UNC base paths that begin with "\\"

Version 15.00 (15.0000) - MAJOR NEW RELEASE - (released 2014-11-11)

Batch Wizard: Can specify more than one user functions file for Batch Wizard jobs (see this forum thread: User functions file(s))
Batch Wizard: New Exclusions tab to make it easier to find the exclusion options and specify them
Batch Wizard: New string list editor to make it easier to specify the options that take a list of semicolon separated strings
Batch Wizard: Changed the behavior of the simple wildcard matching so that strings that don't have an asterisk at the beginning nor the end are treated the same as having an asterisk at both the beginning and the end; this makes it easier and more intuitive to specify target exclusion strings
Editor: The Message tab in the Results Window is renamed Main, and a new Errors (#) tab and a new Warnings (#) tab has been added that only show all the errors or all the warnings. This is a new and easy way to concentrate on the errors and warnings.
Editor: New Results Window Option in the context menu: Options->Jump to First Error or Warning (see this forum thread: Preserving cursor position on reload)
Editor: Improved behavior of the File->Open from the Web function under some circumstances, like when canceled or when binary data is received
Editor: New Edit->Goto Bookmark, Edit->Toggle Bookmark, and Edit->Advanced submenus
Editor: Can now execute custom shell commands from the text inserters (like the User Inserter), using these new configuration attributes: shellexecute, shellflags, and shellparams
Editor: Updates to text inserters, especially the CSS inserter
Editor: Other miscellaneous user interface improvements and changes
Validator: New insecure content warnings when insecure content is detected on a secure page (like insecure iframes on a secure page)
Validator: Updated list of known top-level domains
Validator: Updated list of known Unicode code points
Validator: New sound option (which is enabled by default) to ignore warnings when deciding what sound to play, which allows playing the "success" sound even if the document contains warnings (as long as it does not also contain errors)
Validator: Improved email address syntax checking
Validator: Improved Open Graph meta tag checking
Validator: Updated and improved SEO messages (search engine optimization)
Validator: Miscellaneous updates and improvements to many messages
Application Cache File Validator: New HTML5 application cache file syntax and link checker (.appcache files)
CSS Validator: Improved and updated support for at-rules, including @page, @supports, and more
CSS Validator: Support for the new CSS4 color "rebeccapurple" (see Honoring a great man (new window))
CSS Validator: Added support for Flexbox
CSS Validator: Added support for some new CSS4 media query media features
CSS Validator: Improved support for SVG 1.1 properties (should now ignore them without generating errors)
CSS Validator: Many other updates, changes, and improvements to the CSS checker
HTML Validator: AngularJS support
HTML Validator: Checks the type attribute for the source element and generates a warning/error if a "video/*" type is used in "audio" or "audio/*" type in "video"
HTML Validator: New warnings if the possibility of form data submission to an insecure page is detected on secure pages
HTML Validator: Improved checking of some meta tags
HTML Validator: Improved ARIA checking (warns about some bad practices)
HTML Validator: Improved some validator messages
HTML Validator: Other updates and checking improvements, including improved support for the picture element
JSON validator: New JSON syntax checker/validator
TNPL: Updates and additions to the scripting language, including adding these functions and keywords: CurrentElementNode, eval(), existsFolder(), getNumChildElements(), isAngularJSEnabled, isDestructiveFunctionsEnabled, onInactiveAttributeMessage(); a new flag to write a UTF-8 signature was also added to writeFile(); getLocation() now accepts an element node
The update checker can now download minor updates in the background and then run them (after prompting you) for easier updating.
Windows XP support is officially dropped. It may still work on Windows XP, but Windows XP is no longer officially supported.
Other updates, improvements, and bug fixes throughout

Version 14.0500 - MINOR v14 UPDATE - (released 2014-08-25)

This is a recommended minor update to improve stability, address user reported issues, fix a few bugs, and make a few other improvements and updates, some of which are listed below.
Editor: Improved stability with documents containing unusually long lines (thousands of characters)
Editor: Minor updates to the HTML and CSS inserters
Validator: Updated recognized Unicode character entities
Validator: Updated recognized list of meta names
Validator: Added preliminary picture element support

Version 14.0400 - MINOR v14 UPDATE - (released 2014-06-02)

This is a minor update to address several user reported issues, fix a few bugs, and make a few improvements and updates.

Version 14.0300 - MINOR v14 UPDATE - (released 2014-04-18)

Validator: Added and/or improved support for these CSS properties: content, touch-action, -ms-touch-select
Other: New TNPL functions: getFileInfo(), json_encode(), json_decode(), readFile()
Other: New FastCGI interface for improved 3rd party program integration (supported by NuSphere PhpED v13+)
Other: Miscellaneous improvements, fixes, and updates throughout

Version 14.0204 - MINOR v14 UPDATE - (released 2014-03-24)

Batch Wizard: New TNPL onTargetProcessed() event
Link Checker: Improved media type (MIME type) checking
Validator: Improved handling of IE conditionals
Validator: Improved handling of SSIs in tags
Validator: Miscellaneous bug fixes
Validator: New TNPL onStartTagImpliedFromEndTag() event
Validator: New (URI/URL-non-empty) attribute value in Configuration Editor
Validator: Performance improvements
Validator: Updated and improved nsgmls functionality
Validator: Added some new checks
Other: New "-minimize" command line option for the editor and command line processor to run jobs unobtrusively (like from a batch file)
Other: Miscellaneous improvements and updates throughout

Version 14.0100 - MINOR v14 UPDATE - (released 2014-01-17)

Editor: Ctrl+M to find the matching tag now works better when there are HTML comments that contain tags (plus other improvements)
Editor: Added an option to disable cookie support in 'Open from the Web'
Validator: Bad character reference messages are now more readable and more consistent
Validator: Added support for the srcset attribute for the img element
Validator: Multiple improvements to validator messages
Validator: Multiple updates and improvements to the CSS checker
Fixed: Fixed a bug that could cause an error about using the hasCSSProperty() function when doing a 'Spell check' job using the Batch Wizard
Fixed: Bug that caused a miscalculation of the number of bytes before a character encoding declaration, which could result in a false error message
Fixed: Issue with Pretty Print and UTF-8 that caused character corruption if not using Pretty Print with the Pretty Print dialog
Fixed: Spelling issue that combined two words and reported it as misspelled under certain circumstances, like if they were on separated by only a <br> tag

Version 14.0020 - MINOR v14 UPDATE - (released 2013-11-27)

Editor: New 'Use multi-line tabs' open in the Editor Options->Editor->Document Tabs page (enabled by default)
Validator: Improved & updated CSS checking
Command Line Processor: Default behavior for cmdlineprocessor.com <filename> change - it now defaults to opening <filename> in the editor (see new 'Open in editor instead' option in the 'Validator Engine Options->Validator Engine->Classic' page)
Fixed: Some settings were not being stored in ini files when in portable mode
Other miscellaneous updates and bug fixes

Version 14.00 - MAJOR NEW RELEASE - (expected early November 2013)

Validator: Improved and updated HTML5 checking
Validator: New mobile messages for mobile development and for improving desktop sites when viewed on mobile devices
Editor: Document tabs are now colored after validation, based on whether the document has errors (red) or warnings (yellow) or neither (green)
Editor: Document tabs are now multi-row, and expand to fill up the width of the tab row
Editor: The 'Browser' tab has been split into a 'Preview' tab and a 'Browser' tab to make the integrated web browser easier and more intuitive to use
Editor: New 'Change All Non-ASCII to References' option for selected text; useful for quickly converting non-ASCII characters in a document to their character references
Editor: Updates to the HTML & CSS inserters
Validator: Improved CSS support
Validator: Began adding HTML 5.1 support
Validator: Improved and updated SEO checking
Validator: The spell checker now changes dictionaries based on the lang attribute if it's a supported language, and now comes with more dictionaries to support this
Validator: Checks the X-Robots-Tag HTTP header, if available
Validator: Checks metadata names and rel link types to see if they're registered names or link types
Validator: Removed support for obsolete SMIL, RealText, Netscape, and WebTV
Validator: Improved TNPL includes more functions and is faster and more capable for even better configurability
Validator: Added nsgmls support for these DOCTYPEs: XHTML+RDFa 1.0, XHTML+RDFa 1.1, HTML 4.01+RDFa 1.0, HTML 4.01+RDFa 1.1, HTML 4.01+RDFa Lite 1.1, and XHTML+ARIA 1.0
Command Line Processor: Can now opens URLs in the editor, and new "-w" option dedicated to opening URLs
Added some new task dialogs to improve ease-of-use, especially for first time users.
Fixed: Miscellaneous bug fixes not found in time for the last v12 update
Various component updates
Various other improvements and updates throughout