length of html attribute

Collapse
This topic is closed.
X
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Oliver Block
    #1

    length of html attribute

    Hi,

    I did not find any length limit for attributes. Is there any? Maybe
    "inherited" by SGML?

    Best Regards,

    Oliver

    Tags: None
    • Benjamin Niemann
      #2
      Re: length of html attribute

      Oliver Block wrote:[color=blue]
      > I did not find any length limit for attributes. Is there any? Maybe
      > "inherited" by SGML?[/color]

      The SGML declaration (http://www.w3.org/TR/html40/sgml/sgmldecl.html)
      declares a maximum length of 65536 characters, which is the largest value
      that SGML allows and which comes closest to the 'intended limit' of 'no
      limit'.
      If you write a HTML parser, do not implement size limitations. If you are
      authoring HTML code, you'll win a prize, if you manage to exceed the 64k
      limit with meaningful data...

      --
      Benjamin Niemann
      Email: pink at odahoda dot de
      WWW: http://pink.odahoda.de/

        Comment

        • Andy Dingley
          #3
          Re: length of html attribute


          Benjamin Niemann wrote:
          [color=blue]
          > If you write a HTML parser, do not implement size limitations. If you are
          > authoring HTML code, you'll win a prize, if you manage to exceed the 64k
          > limit with meaningful data...[/color]

          Been there, done that.

          For metadata embedding, it's (reasonably) common practice to embed
          annotations and descriptions as attributes that are lifted from a
          Dublin Core (or similar) "pseudo-namespace". These aren't part of valid
          HTML, but XML namespacing isn't really available to the web yet and
          it's long-established web practice that extra attributes are silently
          and safely ignored by user-agents that don't understand them.

          Once you're adding annotation or metadata, it's not hard to start
          breaking 64k length limits, if you're unaware of the issue.

            Comment

            • Toby Inkster
              #4
              Re: length of html attribute

              Benjamin Niemann wrote:
              [color=blue]
              > If you write a HTML parser, do not implement size limitations. If you are
              > authoring HTML code, you'll win a prize, if you manage to exceed the 64k
              > limit with meaningful data...[/color]

              Writing a CMS, it's often the case that you'll have fairly big chunks of
              data in the value attributes for hidden INPUT elements.

              --
              Toby A Inkster BSc (Hons) ARCS
              Contact Me ~ http://tobyinkster.co.uk/contact

                Comment

                Previous template Next
                Working...