Syntax errors are sent to the standard output device. The line and
column of the syntax error is also provided. The parser produces the following syntax
errors:
- Unknown tag <tag>
- The parser does not reorganize the tag.
- <!doctype> cannot be redefined
- The document type statement appears more than once in the file.
- <!doctype> must appear before <html>
- The document type statement must appear before any text or HTML markup.
- </tag> does not exist
- The tag does not have a closing tag, for example </br>.
- <tag> is not currently open
- The closing tag is not matched by a previous opening tag.
- <tag> adding missing <missing¡tag>
- A required container tag was not found, but was inserted by the parser.
- ignoring <tag>, no enclosing <enclosing¡tag>
- An orphan tag was encountered, which cannot be corrected, such as <param>
without an enclosing <applet> tag.
- <tag> has already been closed
- The definition tag (such as <head>) was previously closed, possibly
as the result of another tag, such as <body>.
- <tag> is already defined
- The definition tag (such as <head>) has already been defined.
- <tag> cannot be placed after <other tag>
- The tag, for example <head> is placed out of order, after the <body>
tag in this case.
- not an HTML file (no <html>, <head>, <title> or <body>
before #PCDATA)
- The parser does not recognize the text file as being HTML. The file will
still be read, and all words parsed. The words will be added to the body list.
- expecting '>' after SGML markup
- The > character is missing from the end of a SGML markup
tag.
- expecting '-->' to end SGML comment
- The SGML comment is not correctly terminated, for example <!-- comment
>
- incorrect SGML comment syntax
- The SGML comment is incorrectly tagged; for example <! comment
-->
- expecting '>' after markup name
- The HTML markup tag was not correctly terminated, for example <samp
- missing attribute name before '='
- No name was found before the '=' character.
- ignoring redefinition of attribute 'attr'
- The tag attribute is defined more than once.
- expecting attribute name
- The attribute name was not found after the tag name.
- expecting attribute value
- The attribute value was not found after the '=' character.
- attribute value must be quoted
- The attribute value contains characters which must be enclosed in quotes. Only letters,
numbers, the '.' and '_' characters can appear without quotes.
- unterminated literal
- The attribute value has no terminating quote, for example "java.html.
- empty literal
- The quotes attribute value contains no characters; "".
- expecting '>' after end markup name
- The HTML end markup tag was not correctly terminated, for example </samp.
- numeric entity exceeds 65535
- The numeric entity &#number; is larger than the largest Unicode
character.
- expecting ';' after numeric entity
- The numeric entity is missing the ';' terminator.
- 'amp¡ent' is not a valid ampersand entity
- The ampersand entity is unknown. The current list of ampersand entities is given in the
appendix Ampersand entities. This error could be due to a
missing ';' terminator such as R&D.
- expecting ';' after ampersand entity
- The ampersand entity is missing the ';' terminator.
- Ill formed URL escape
- The escaped URL character is not a two hexadecimal character sequence. A
correct sequence is, for example, %7e or %7E for the tilde
character '~'.
- reserved URL characters must be escaped
- The character must be converted into an URL escape sequence.
- missing schema before ':'
- The URL has no schema (http, ftp, mailto
etc) before the schema delimiter character ':'.
- missing <tag> before <other¡tag>
- A required container tag was not found, for example a <li> tag before
text within a <ul> tag.
- <tag> cannot be contained by <container¡tag>
- The tag cannot appear within the container tag, and cannot be corrected by the parser.
The tag is ignored.
- <tag> must contain at least one element
- The container tag is empty, (has no elements), when the HTML 3.2 DTD
defines the tag as requiring one or more elements.
- assuming <end¡tag> closes <tag>
- The parser is correcting for a tag mismatch, such as <h1> ...</h2>.
- <tag> cannot be used in <container¡tag>
- The tag cannot appear within the container tag. The parser corrects by closing the
<container-tag>.
- missing <tag>
- An obligatory tag such as <title> was not found in the HTML
file.
- missing <body> or <frameset>
- The HTML file contains no displayable text.
- warning: uses deprecated tags
- Deprecated tags were found in the HTML document.
- warning: uses extensions to the HTML 3.2 DTD
- Browser specific extensions were found in the HTML document.
- warning: has unknown tags
- Unknown tags were found in the HTML document.
- expecting </end¡tag> before <tag>
- An obligatory end tag was not found, such as the </title> tag before
a <body> tag.
- expecting </end¡tag> before end-of-file
- An obligatory end tag was not found when the end of file was reached.
- warning: missing <!doctype> declaration
- HTML DTD 3.2 compliant documents require a <!doctype ... >
statement.
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