W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents. ... If you are interested in helping to improve this service, by writing code or just providing ideas, you should feel free to join or send a message to our mailing-list. ...The W3C MarkUp Validation Service is a web gateway to a well known SGML parser called SP. SP will take your HTML and compare it to a set of objective syntax rules called a "DTD", a Document Type Definition. This way you can be sure your HTML is really valid and not just that it conforms to some random programmer's idea of "nice" …The W3C Markup Validator is an open source software and free W3C service helping Web Document authors fix errors in the markup of their HTML, XHTML, …W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents. Validate by URI; ... Explorer on some versions of Windows XP Service Pack 2, see our information page on the W3C QA Website. Validate by direct input. Enter the Markup to validate: …Excessive use of the W3C Validation Service will be blocked. Table of Contents. Validation Request Format; SOAP format description. sample SOAP 1.2 validation response; ... Below is a table of the parameter you can use to send a query to the W3C Markup Validator. If you want to use W3c's public validation server, use the …The W3C MarkUp Validator: This looks at the (X)HTML doctype you are using for the document you give it to check, and then checks your markup accordingly. This is the one we recommend if you are using an HTML4 or XHTML1.x doctype. It does validate HTML5, but validator.nu is arguably more up to date. The W3C Link Checker: This looks … W3C Markup Validation Service (마크업 유효성 검사 서비스)는 인터넷 사용자가 HTML5 이전 HTML 및 XHTML 문서에서 문서 유형 정의에 대해 올바른 형식의 마크업을 확인할 수 있도록 하는 W3C ( 월드 와이드 웹 컨소시엄 )의 유효성 검사기이다. 마크업 유효성 검사는 웹 ... About the Markup Validator Help me! I clicked on an icon and ended up on this strange site! Don't panic! The author of the Web page you come from once used our service to validate that page, and the page passed validation. The author was then authorized to use the icon on that page, as a claim of validity.The icon is used as a link back to the …W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents. Validate by URI; Validate by File Upload; Validate by Direct Input; Validate by URI. Validate a document online: Address:About the Markup Validator Help me! I clicked on an icon and ended up on this strange site! Don't panic! The author of the Web page you come from once used our service to validate that page, and the page passed validation. The author was then authorized to use the icon on that page, as a claim of validity.The icon is used as a link back to the …W3C Markup Validation Service W3C Markup Validation Service is a HTML validator you can run online. It will run against any public facing URL. Alternatively you can copy and paste in any HTML to run it against. We have published guidance on how to validate HTML using the W3C HTML Markup Validation Service.2005-10-18: Markup Validator v0.7.1 Released Released version 0.7.1 of the Markup Validator, a maintenance release introducing performance enhancements and including minor fixes in the user interface and in the "Direct Input" validation results. These are the most recent major changes to this service. Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Favelets For The Validator. Favelets are small snippets of JavaScript embedded in a Bookmark URL that allow Bookmarks in browsers to do various advanced things. Popular Favelets include variants that prompt the user for a phrase and search the web for that phrase, or that finds older versions of the currently viewed page in the WayBack Machine . W3C Markup Validation Service. Tag certifying that a website has been checked for well-formed XHTML (above) and CSS (below) markup. The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition. This is the W3C Markup Validation Service, a free service that checks Web documents in formats like HTML and XHTML for conformance to W3C Recommendations and other …W3C's easy-to-use markup validation service, based on SGML and XML parsers.1. Visit the [W3C Markup Validation Service website](https://validator.w3.org/). 2. Input your website's URL or upload your HTML file. 3. Click on the "Check" button to initiate …The W3C Markup Validation Service by the World Wide Web Consortium allows you to validate HTML files by URI, by file upload and by direct input of complete HTML documents. There are also separate pages with an extended interface for file upload and for validating by URI (advanced options such as encodings and document types). ... W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents ... In any browser, open the W3C HTML Validator (The W3C Markup Validation Service). In the Address field, type the URI (e.g., www.w3.org). Click the More Options link. Select the Outline checkbox. Click the Check button. The results page appears (with title starting either [Valid] or [Invalid]). The Markup Validator is a free service by W3C that helps check the validity of Web documents. Most Web documents are written using markup languages , such as HTML or XHTML . These languages are defined by technical specifications , which usually include a machine-readable formal grammar (and vocabulary). The HalSoft HTML validation service was an integral part of its development. The HTML working group of the IETF, originally organized by Dan Connolly, provides a completely open forum where all interested parties -- W3C, software vendors, and other organizations and individuals alike -- can propose and/or review HTML … W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents ... The W3C Markup Validation Service by the World Wide Web Consortium allows you to validate HTML files by URI, by file upload and by direct input of complete HTML documents. There are also separate pages with an extended interface for file upload and for validating by URI (advanced options such as encodings and document types). Installation ... Documentation: access key "3" leads to the documentation index for the service. Feedback: access key "4" leads to the feedback instructions. W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ...The markup validator currently checks a single page. Some companion software (such as the log validator) could be made into a web service to provide crawling, ...Find the best home service providers in Phoenix with data-driven ratings from Find a Pro. Expert Advice On Improving Your Home All Projects Featured Content Media Find a Pro About ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Markup Validator Web Service API SOAP 1.2 validation interface documentation. Interface applications with the Markup Validator through its experimental API. This is version 0.2, dated May 2007. ... Below is a table of the parameter you can use to send a query to the W3C Markup Validator. If you want to use W3c's public validation server, …the (X)HTML validator which is used to validate HTML4 and XHTML documents, and provides the shared front-end for markup validation; the NU validator which is the most actively maintained project, used to validate HTML5 / HTML LS documents. Before you enter a new bug, we strongly encourage you to check that it is not yet in the list of …The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web standards. Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ...W3C Markup Validation Service je validator po W3C (World Wide Web Consortium) standardu, koji omogućava Internet korisnicima da provere da li su njihova HTML i XHTML dokumenta dobro formirana. Validacija je važan korak pri obezbeđivanju tehničkog kvaliteta web stranica. Iako je W3C validacija važna zbog kompatibilnosti pregledača i ...If you work in the food service industry, then you understand the importance of food safety and hygiene. One crucial aspect of maintaining these standards is having a valid food ha...The best strategy is to start by running your HTML page through the Markup Validation Service — created and maintained by the W3C, the organization that looks …A free service that validates documents for conformance to W3C Recommendations and other standards. Enter a URI or upload a file, or use the … Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... W3C Markup Validation Service (마크업 유효성 검사 서비스)는 인터넷 사용자가 HTML5 이전 HTML 및 XHTML 문서에서 문서 유형 정의에 대해 올바른 형식의 마크업을 확인할 수 있도록 하는 W3C ( 월드 와이드 웹 컨소시엄 )의 유효성 검사기이다. 마크업 유효성 검사는 웹 ... W3C tracks bug reports on the validator through the GitHub repositories where the code is maintained. Developers and other technical users can log bug reports and feature suggestions directly. If you are not familiar with issue tracking systems in general, send your feedback to the mailing list and someone on the W3C Validator Team will take ...Validate Uploaded File. Note: file upload may not work with Internet Explorer on some versions of Windows XP Service Pack 2, see our information page on the W3C QA Website. If your document is on the Web, you can validate it with the same advanced options by entering its address instead. W3C's easy-to-use markup validation service, based on ...The Markup Validator is a free tool and service that validates markup: in other words, it checks the syntax of Web documents, written in formats such as (X)HTML. The Validator is sort of like lint for C. It compares your HTML document to the defined syntax of HTML and reports any discrepancies. Learn more about the Markup Validator and the ...W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents. Validate by URI; ... Explorer on some versions of Windows XP Service Pack 2, see our information page on the W3C QA Website. Validate by direct input. Enter the Markup to validate: … Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Favelets For The Validator. Favelets are small snippets of JavaScript embedded in a Bookmark URL that allow Bookmarks in browsers to do various advanced things. Popular Favelets include variants that prompt the user for a phrase and search the web for that phrase, or that finds older versions of the currently viewed page in the WayBack Machine . This page lists a few test documents and test scenarios for the W3C Markup Validator make sure everything works fine after making changes to the validator. If you can think of interesting test cases that aren't on this page, let us know . This test suite is work in progress. Please submit any issue or idea to the public mailing-list public-qa ... \n \n About W3C Validation services \n \n W3C provides various free validation services \n that help check the conformance of Web sites against open standards.\n The W3C Markup Validation Service is not generating the error messages - they are all generated by the underlying Parser - but it is appending short explanations and suggested fixes for each error. We provide a feedback channel for users to suggest better explanations and more accurate solutions. Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ...Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... The W3C Markup Validation Service by the World Wide Web Consortium allows you to validate HTML files by URI, by file upload and by direct input of complete HTML documents. There are also separate pages with an extended interface for file upload and for validating by URI (advanced options such as encodings and document types). ...W3C Markup Validation Service If your website is on a public URL you can use the W3C Markup Validation Service. If you need to validate HTML on your local machine HTML Validator is a better option. If the webpages are live, you can copy and paste the URI into the ‘Validate by URI’ tab. If you are working with html files, these can be ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Better hope they were breathable. New reporting from the frontlines of the athleisure movement indicates that people not only love soft, stretchy pants, they are willing to pay an ...Markup Validation Service, er et gratis net-hjælpeværktøj fra World Wide Web Consortium (W3C), hvis formål er kvalitetssikring af hjemmesider, som foretages ved en validering (kontrol) på udførte projekter. Dette i henhold til anbefalede regler fra W3C.To print Groupon vouchers, create an account at Groupon.com, indicate your city and provide an valid email address. Find and purchase a Groupon, and follow any instructions for obt...“I put in a request for my annual review three weeks ago,” a friend told me. “I’ve reminded my supervi “I put in a request for my annual review three weeks ago,” a friend told me. ...This instance of the validator is either a development version used for testing purposes, or a local copy of the W3C Markup Validator software used for development and testing purposes. The official validation service supported by the W3C is at validator.w3.org . W3C's easy-to-use markup validation service, based on SGML and XML parsers.Jan 5, 2017 ... How To Validate HTML - Using an HTML Validator. 10K views · 7 years ago ...more. Ken ... Using the W3C Markup Validation Service to check your ...Jan 5, 2017 ... How To Validate HTML - Using an HTML Validator. 10K views · 7 years ago ...more. Ken ... Using the W3C Markup Validation Service to check your ...KuCoin Community Chain (KCC), has officially announced the KCC Validator Election on June 16, 2022. Receive Stories from @kcc Publish Your First Brand Story for FREE. Click Here.Welcome to the W3C MarkUp Validation Service; a free service that checks documents like HTML and XHTML for conformance to W3C Recommendations and other standards. Validate Files. You can enter a URI in the Address field below, or choose a file to upload. There is also an Extended ...The Hatchimals craze is in full effect in the U.S., with the toy sold out in stores and getting steep markups on eBay. Parents in Canada, Ireland, Australia, and the UK are also pa...Activating WatchESPN requires a computer, a current flash player and a valid service provider such as Charter or Cox TV. The WatchESPN feature is free to customers whose television...These should be tied to a bug report on either mailing-list and/or bugzilla whenever possible. validate - with v.w.o - view : Test of doctype override for SVG document with no doctype, but an XML decl. The doctype should sneak between the XML decl and the root svg start tag. ( 857 - DOCTYPE Override ) W3C's easy-to-use markup validation service ...The Markup Validator is a free tool and service that validates markup: in other words, it checks the syntax of Web documents, written in formats such as (X)HTML. The Validator is sort of like lint for C. It compares your HTML document to the defined syntax of HTML and reports any discrepancies. Learn more about the Markup Validator and the ...W3C Markup Validation Service with Selenium. Hot Network Questions What, if anything, is known about Bach's interpretation of, or emphasis on, meter? Professor gets funding and does not give to student Is the bivalence in classical logic just black or white thinking? Is This a Fake Bank? ...Check beyond markup. This may be in the roadmap for Unicorn rather than the markup validator, but it fits in the "long-term" vision of developing the W3C Web Quality services. Checking of RDDL, RDFa, microformats and other rich markup are in scope. Many other checks could be added to the validators, such as: document cacheability. spell checking.Validate Uploaded File. Note: file upload may not work with Internet Explorer on some versions of Windows XP Service Pack 2, see our information page on the W3C QA Website. If your document is on the Web, you can validate it with the same advanced options by entering its address instead. W3C's easy-to-use markup validation service, based on ...¿Qué es y para qué se usa el W3C Markup Validator?Post: http://handicode.com/blog/w3c-validatorURL del W3C Validator: https://validator.w3.org/Contenido orig...High Arctic Energy Services News: This is the News-site for the company High Arctic Energy Services on Markets Insider Indices Commodities Currencies Stocks The installation guide assumes that you have a working Web server. We suggest the popular Apache server, which is used for the W3C Markup Validation service. The validator may work with other Web servers than the popular Apache, but we cannot guarantee that it will. Viewing your text message history typically requires access to your service provider’s website with a valid user name or cell phone number and a password. Access the Verizon Wirele...This page lists recent changes to the W3C Markup Validation Service.For minor changes and bug fixes that aren't listed on this page, see the Mercurial log. News for this service are also available as an Atom feed. Want to know not just the latest news but see the future and read about what's next?歴史. Markup Validation ServiceはGerald OskoboinyによるThe Kinder, Gentler HTML Validatorとして始まった。 これはDan Connolly and Mark Gaitherによって作られた初めてのオンラインHTML検証系よりも直感的に使えるように開発され、1994年7月13日に公開された 。. 1997年9月にOskoboinyはW3Cで働き始め、1997年12月18日にW3Cは ...About this service. The Markup Validator is a free service by W3C that helps check the validity of Web documents.. Most Web documents are written using markup languages, such as HTML or XHTML.These languages are defined by technical specifications, which usually include a machine-readable formal grammar (and vocabulary). ). The act of …The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition.Markup validation is an important step towards ensuring the technical quality of web pages. However, it is … Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents. Though grief is valid for any type of loss, sometimes those close to us don't consider our grief grievable. This is called disenfranchised grief. Grieving is hard enough. When thos...If you work in the food service industry, then you understand the importance of food safety and hygiene. One crucial aspect of maintaining these standards is having a valid food ha...W3C Markup Validation Service és un sistema de validació creat pel World Wide Web Consortium (W3C) que deixa comprovar als usuaris d'Internet que els documents HTML i XHTML tenen les marques ben formades. D'aquesta manera permet assegurar la qualitat tècnica de les pàgines web. Tot i que la validació del W3C és important per a la ...The W3C has announced the launch of the Nu Markup Validation Service.It says the non-DTD-based markup validator is offered in parallel to the existing DTD-based validator. "The W3C Nu Markup Validation Service uses the same backend as the Validator.nu site, which is also the backend for the HTML5-checking feature of … W3C's easy-to-use markup validation service, based on SGML and XML parsers. Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents ...
Getting the source. The source code for the W3C Markup Validation Service is available under the terms of the W3C Software License. If you just want to glance at the code, or see its revision history, you can browse it directly in Github . The most interesting files are currently a CGI script called "check" that does pretty much everything, and .... Redeem coupon
The W3C Markup Validation Service is a web gateway to SGML and XML parsers, and various other specialized validation services. The underlying implementations will take your document and compare it to a set of objective syntax rules for the submitted document. For example for HTML documents this set of rules is called a "DTD", a Document Type ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... The W3C Markup Validator is an entirely open source project hosted by W3C: there are many ways you can help make it a better, friendlier, more powerful software, and keep it free forever: Help Others. Great communities make great tools. It only takes: A few minutes of your time, and a bit of patience. Subscribe to the validator's mailing-list ...Question: #1 Which of the following is NOT one of the three testing phases of a JavaScript application? a.trying to make the application fail b.using the W3C Markup Validation Service to validate the HTML c.testing the application with valid data d.testing the application with invalid data #2 Code Example 5-1 1. var getResult = function () { 2 ... New architecture, faster and more reliable, scaling better to the growing usage of the validator. Improved interface for better usability, accessibility. New feature: automatic cleanup of markup (with HTML-Tidy). New feature: additional XML-Well-Formedness check, for more reliable validation of XML-based languages. Step-by step guide for the installation of the Markup Validator on your server. Use the validator from your applications with the experimental Markup Validator Web service, and its open API. Information for programmers wanting to play with the validator's code, and/or contribute to its development. An introduction to concepts of SGML, DTDs and ...1: length of parameter entity name must not exceed NAMELEN less the length of the PERO delimiter (X) . 2: length of number must not exceed NAMELEN (X) . 3: length of attribute value must not exceed LITLEN less NORMSEP (X) . 4: a name group is not allowed in a parameter entity reference in the prolog .The W3C Markup Validator is an open source software and free W3C service helping Web Document authors fix errors in the markup of their HTML, XHTML, … Markup Validation Service. Check the markup (HTML, XHTML, …) of Web documents. Note: file upload may not work with Internet Explorer on some versions of Windows XP Service Pack 2, see our information page on the W3C QA Website. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... The Markup Validator is a free tool and service that validates markup: in other words, it checks the syntax of Web documents, written in formats such as (X)HTML. The Validator is sort of like for C. It compares your HTML document to the defined syntax of HTML and reports any discrepancies. Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, ... The Official (W3C) Markup Validation Service; The XML FAQ originally for the W3C's XML SIG by Peter Flynn This page was …The Markup Validator is a free tool and service that validates markup: in other words, it checks the syntax of Web documents, written in formats such as (X)HTML. The Validator is sort of like lint for C. It compares your HTML document to the defined syntax of HTML and reports any discrepancies. Learn more about the Markup Validator and the ...Validate Uploaded File. Note: file upload may not work with Internet Explorer on some versions of Windows XP Service Pack 2, see our information page on the W3C QA Website. If your document is on the Web, you can validate it with the same advanced options by entering its address instead. W3C's easy-to-use markup validation service, based on ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ...Find the best home service providers in San Diego with data-driven ratings from Find a Pro. Expert Advice On Improving Your Home All Projects Featured Content Media Find a Pro Abou...Documentation for the W3C Markup Validator. Here you will find the documentation for The W3C Markup Validation Service. We are constantly working on improving this …High Arctic Energy Services News: This is the News-site for the company High Arctic Energy Services on Markets Insider Indices Commodities Currencies Stocks Markup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ... .