# Option: valid_elements

This option should contain a comma separated list element convertion chunks. Each chunk contains information about how one element and it's attributes should be treated. The default rule set for this option is specified below.

Control characters:
, | Separates element chunk definitions.
/ | Separates element synonymous. The first element is the one that will be outputted.
| | Separates attribute definitions.
[ | Starts a new attribute list for a element definition.
] | Ends a attribute list for a element definition.
= | Makes the attribute to default to the specified value. For example "target=_blank"
: | Makes the attribute to be forced to the specified value. For example "border:0"
< | Verifies the value of a attribute. For example "target<_blank?_self"
? | Separates attribute verification values, see above.
+ | Makes the element open if no child nodes exists. Example: +a.
- | Enables removal of empty elements such as >strong /<. Example: -strong.

Wildcards such as *,+,? may be used in element or attribute name matching.

Special variables:
{$uid} Results in a unique ID. For example "p[id:{$uid}]".
Use *[*] to include all elements and all attributes this can be very useful when used with the invalid_elements option.

### Example of usage of the valid_elements option:

This example string tells TinyMCE to remove all elements that are not a "a, strong, div or br" element, convert b elements to strong elements, default target to "_blank" and keep the href, target and align attributes of the elements.

    tinyMCE.init({
    	...
    	valid_elements : "a[href|target=_blank],strong/b,div[align],br"
    });

### Default rule set:

This is the default string used by TinyMCE to cleanup the HTML contents.

    +a[id|style|rel|rev|charset|hreflang|dir|lang|tabindex|accesskey|type|name|href|target|title|class|onfocus|onblur|onclick|ondblclick|onmousedown|onmouseup|onmouseover|onmousemove|onmouseout|onkeypress|onkeydown|onkeyup],-strong/b[class|style],-em/i[class|style],-strike[class|style],-u[class|style],+p[style|dir|class|align],-ol[class|style],-ul[class|style],-li[class|style],br,img[id|dir|lang|longdesc|usemap|style|class|src|onmouseover|onmouseout|border=0|alt|title|hspace|vspace|width|height|align],-sub[style|class],-sup[style|class],-blockquote[dir|style],-table[border=0|cellspacing|cellpadding|width|height|class|align|summary|style|dir|id|lang|bgcolor|background|bordercolor],-tr[id|lang|dir|class|rowspan|width|height|align|valign|style|bgcolor|background|bordercolor],tbody[id|class],thead[id|class],tfoot[id|class],-td[id|lang|dir|class|colspan|rowspan|width|height|align|valign|style|bgcolor|background|bordercolor|scope],-th[id|lang|dir|class|colspan|rowspan|width|height|align|valign|style|scope],caption[id|lang|dir|class|style],-div[id|dir|class|align|style],-span[style|class|align],-pre[class|align|style],address[class|align|style],-h1[style|dir|class|align],-h2[style|dir|class|align],-h3[style|dir|class|align],-h4[style|dir|class|align],-h5[style|dir|class|align],-h6[style|dir|class|align],hr[class|style],font[face|size|style|id|class|dir|color]

### Full XHTML rule set:

This is the default string used by TinyMCE to cleanup the HTML contents.

    valid_elements : ""
    +"a[accesskey|charset|class|coords|dir<ltr?rtl|href|hreflang|id|lang|name"
      +"|onblur|onclick|ondblclick|onfocus|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|rel|rev"
      +"|shape<circle?default?poly?rect|style|tabindex|title|target|type],"
    +"abbr[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"acronym[class|dir<ltr?rtl|id|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"address[class|align|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|style|title],"
    +"applet[align<bottom?left?middle?right?top|alt|archive|class|code|codebase"
      +"|height|hspace|id|name|object|style|title|vspace|width],"
    +"area[accesskey|alt|class|coords|dir<ltr?rtl|href|id|lang|nohref<nohref"
      +"|onblur|onclick|ondblclick|onfocus|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup"
      +"|shape<circle?default?poly?rect|style|tabindex|title|target],"
    +"base[href|target],"
    +"basefont[color|face|id|size],"
    +"bdo[class|dir<ltr?rtl|id|lang|style|title],"
    +"big[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"blockquote[dir|style|cite|class|dir<ltr?rtl|id|lang|onclick|ondblclick"
      +"|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout"
      +"|onmouseover|onmouseup|style|title],"
    +"body[alink|background|bgcolor|class|dir<ltr?rtl|id|lang|link|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onload|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|onunload|style|title|text|vlink],"
    +"br[class|clear<all?left?none?right|id|style|title],"
    +"button[accesskey|class|dir<ltr?rtl|disabled<disabled|id|lang|name|onblur"
      +"|onclick|ondblclick|onfocus|onkeydown|onkeypress|onkeyup|onmousedown"
      +"|onmousemove|onmouseout|onmouseover|onmouseup|style|tabindex|title|type"
      +"|value],"
    +"caption[align<bottom?left?right?top|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"center[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"cite[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"code[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"col[align<center?char?justify?left?right|char|charoff|class|dir<ltr?rtl|id"
      +"|lang|onclick|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown"
      +"|onmousemove|onmouseout|onmouseover|onmouseup|span|style|title"
      +"|valign<baseline?bottom?middle?top|width],"
    +"colgroup[align<center?char?justify?left?right|char|charoff|class|dir<ltr?rtl"
      +"|id|lang|onclick|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown"
      +"|onmousemove|onmouseout|onmouseover|onmouseup|span|style|title"
      +"|valign<baseline?bottom?middle?top|width],"
    +"dd[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style|title],"
    +"del[cite|class|datetime|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|style|title],"
    +"dfn[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"dir[class|compact<compact|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|style|title],"
    +"div[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"dl[class|compact<compact|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|style|title],"
    +"dt[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style|title],"
    +"em/i[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"fieldset[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"font[class|color|dir<ltr?rtl|face|id|lang|size|style|title],"
    +"form[accept|accept-charset|action|class|dir<ltr?rtl|enctype|id|lang"
      +"|method<get?post|name|onclick|ondblclick|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|onreset|onsubmit"
      +"|style|title|target],"
    +"frame[class|frameborder|id|longdesc|marginheight|marginwidth|name"
      +"|noresize<noresize|scrolling<auto?no?yes|src|style|title],"
    +"frameset[class|cols|id|onload|onunload|rows|style|title],"
    +"h1[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"h2[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"h3[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"h4[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"h5[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"h6[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"head[dir<ltr?rtl|lang|profile],"
    +"hr[align<center?left?right|class|dir<ltr?rtl|id|lang|noshade<noshade|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|size|style|title|width],"
    +"html[dir<ltr?rtl|lang|version],"
    +"iframe[align<bottom?left?middle?right?top|class|frameborder|height|id"
      +"|longdesc|marginheight|marginwidth|name|scrolling<auto?no?yes|src|style"
      +"|title|width],"
    +"img[align<bottom?left?middle?right?top|alt|border|class|dir<ltr?rtl|height"
      +"|hspace|id|ismap<ismap|lang|longdesc|name|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|src|style|title|usemap|vspace|width],"
    +"input[accept|accesskey|align<bottom?left?middle?right?top|alt"
      +"|checked<checked|class|dir<ltr?rtl|disabled<disabled|id|ismap<ismap|lang"
      +"|maxlength|name|onblur|onclick|ondblclick|onfocus|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|onselect"
      +"|readonly<readonly|size|src|style|tabindex|title"
      +"|type<button?checkbox?file?hidden?image?password?radio?reset?submit?text"
      +"|usemap|value],"
    +"ins[cite|class|datetime|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|style|title],"
    +"isindex[class|dir<ltr?rtl|id|lang|prompt|style|title],"
    +"kbd[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"label[accesskey|class|dir<ltr?rtl|for|id|lang|onblur|onclick|ondblclick"
      +"|onfocus|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout"
      +"|onmouseover|onmouseup|style|title],"
    +"legend[align<bottom?left?right?top|accesskey|class|dir<ltr?rtl|id|lang"
      +"|onclick|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"li[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style|title|type"
      +"|value],"
    +"link[charset|class|dir<ltr?rtl|href|hreflang|id|lang|media|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|rel|rev|style|title|target|type],"
    +"map[class|dir<ltr?rtl|id|lang|name|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"menu[class|compact<compact|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|style|title],"
    +"meta[content|dir<ltr?rtl|http-equiv|lang|name|scheme],"
    +"noframes[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"noscript[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"object[align<bottom?left?middle?right?top|archive|border|class|classid"
      +"|codebase|codetype|data|declare|dir<ltr?rtl|height|hspace|id|lang|name"
      +"|onclick|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|standby|style|tabindex|title|type|usemap"
      +"|vspace|width],"
    +"ol[class|compact<compact|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown"
      +"|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover"
      +"|onmouseup|start|style|title|type],"
    +"optgroup[class|dir<ltr?rtl|disabled<disabled|id|label|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"option[class|dir<ltr?rtl|disabled<disabled|id|label|lang|onclick|ondblclick"
      +"|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout"
      +"|onmouseover|onmouseup|selected<selected|style|title|value],"
    +"p[align<center?justify?left?right|class|dir<ltr?rtl|id|lang|onclick"
      +"|ondblclick|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove"
      +"|onmouseout|onmouseover|onmouseup|style|title],"
    +"param[id|name|type|value|valuetype<DATA?OBJECT?REF],"
    +"pre/listing/plaintext/xmp[align|class|dir<ltr?rtl|id|lang|onclick|ondblclick"
      +"|onkeydown|onkeypress|onkeyup|onmousedown|onmousemove|onmouseout"
      +"|onmouseover|onmouseup|style|title|width],"
    +"q[cite|class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"s[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style|title],"
    +"samp[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"script[charset|defer|language|src|type],"
    +"select[class|dir<ltr?rtl|disabled<disabled|id|lang|multiple<multiple|name"
      +"|onblur|onclick|ondblclick|onfocus|onkeydown|onkeypress|onkeyup"
      +"|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|size|style"
      +"|tabindex|title],"
    +"small[class|dir<ltr?rtl|id|lang|onclick|ondblclick|onkeydown|onkeypress"
      +"|onkeyup|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|style"
      +"|title],"
    +"span[align