HTML is a mark-up language used to create websites, and is independent of platforms.
"HTML is not a programming language, since HTML does not allow to, say, control a robot, set a variable or programme a game." (Quelle)
The display of invalid or incorrect documents depends on the software reading them (browser, roboter, screenreader, etc; see above). However, the display will vary greatly depending on the software, and this can lead to errors, often without the knowledge of the website manager, since it is impossible to test the website against all updates of all the software.
Non validated HTML source text can cause high costs, especially if it causes the software to look for an error or if the functionality and therefore the user experience is impacted.
Further information:
The validity of the HTML source text can be checked with a so-called 'validator'.
Examples:
Further information
http://blog.antikoerperchen.de/beitrag/28/validierung-wozu-warum-valider-html-code-wichtig-ist.html
Acronyms:
HTML: HyperText Markup Language
The majority of the pages are valid, but not all.
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A potential hint has been identified.
When clicking on a link, web users expect to see the new page in the existing window. Most users lose control if there are several windows open, are unable to navigate back with the back function and get lost. At the same time, and this is particularly true for old computers, the system can get overloaded and crash if too many browser windows open. If new windows open but are not seen by the user, the perception is that the website does not work properly. Experienced users who want to open new windows know how to do this by using the function "Open (link) in New Window", or with similar comands.
There is one important exception to this rule: files in .PDF or other Office format can be opened in new windows. Users know to close them to return to the original window. In this case, users should be informed that a new window opened, and they should be given the opportunity to save the file.
Technical hint: For XHTML Strict in particular, there is the possibility to send a .PDF file with ContentType "application/pdf" and HTTP Header content-disposition: attachment; filename=filename.pdf, since there is no target attribute. This test does not take it into account yet, but this is a feasible solution.
Source and further information:
"Prioritizing Web Usability" by Jakob Nielsen/Hoa Loranger
At least one internal hyperlink opening a new window was found.
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A potential hint has been identified.
Keywords allow internal and external search crawlers to find content for interested users. Keywords should be chosen from the language and vocabulary of the web user to describe the page content as closely as possible. .
The use of precise and meaningful keywords is still an advantage, even though the importance of the keywords has dramatically decreased for external crawlers. Internal crawlers can still trust your keywords and improve your website search feature.
Source and further information:
"Prioritizing Web Usability" by Jakob Nielsen/Hoa Loranger
http://www.essex.ac.uk/wag/searchguide/search2.aspx
The tested website does not use any keywords.
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A potential hint has been identified.
This test result is available for registered users and Premium Members.
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A potential hint has been identified.
This test result is available for registered users and Premium Members.
More than two thirds of the test results will be available to you once registration has been successfully completed.
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A potential hint has been identified.
This test result is available for registered users and Premium Members.
More than two thirds of the test results will be available to you once registration has been successfully completed.
To have full access to the test results, and to be notified about changes in quality of the observed website, please register and upgrade to Premium Membership.
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A potential hint has been identified.
This test result is available for registered users and Premium Members.
More than two thirds of the test results will be available to you once registration has been successfully completed.
To have full access to the test results, and to be notified about changes in quality of the observed website, please register and upgrade to Premium Membership.
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A potential hint has been identified.
This test result is available for registered users and Premium Members.
More than two thirds of the test results will be available to you once registration has been successfully completed.
To have full access to the test results, and to be notified about changes in quality of the observed website, please register and upgrade to Premium Membership.
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A potential hint has been identified.