th
                  th — A table header entry in an HTML table
th ::= (#PCDATA|footnoteref|xref|biblioref|abbrev|acronym|citation|citerefentry|citetitle|citebiblioid|emphasis|firstterm|foreignphrase|glossterm|termdef|footnote|phrase|orgname|quote|trademark|wordasword|personname|link|olink|ulink|action|application|classname|methodname|interfacename|exceptionname|ooclass|oointerface|ooexception|package|command|computeroutput|database|envar|errorcode|errorname|errortype|errortext|filename|function|guibutton|guiicon|guilabel|guimenu|guimenuitem|guisubmenu|hardware|interface|keycap|keycode|keycombo|keysym|literal|code|constant|markup|medialabel|menuchoice|mousebutton|option|optional|parameter|prompt|property|replaceable|returnvalue|sgmltag|structfield|structname|symbol|systemitem|uri|token|type|userinput|varname|nonterminal|anchor|author|authorinitials|corpauthor|corpcredit|modespec|othercredit|productname|productnumber|revhistory|remark|subscript|superscript|inlinegraphic|inlinemediaobject|inlineequation|synopsis|cmdsynopsis|funcsynopsis|classsynopsis|fieldsynopsis|constructorsynopsis|destructorsynopsis|methodsynopsis|indexterm|beginpage|calloutlist|glosslist|bibliolist|itemizedlist|orderedlist|segmentedlist|simplelist|variablelist|caution|important|note|tip|warning|literallayout|programlisting|programlistingco|screen|screenco|screenshot|formalpara|para|simpara|graphic|mediaobject|table|informaltable)*
| 
                         Name  | 
                     
                         Type  | 
                     
                         Default  | 
                  ||||||
| arch | CDATA | None | ||||||
| ondblclick | CDATA | None | ||||||
| axis | CDATA | None | ||||||
| os | CDATA | None | ||||||
| abbr | CDATA | None | ||||||
| onkeydown | CDATA | None | ||||||
| onkeyup | CDATA | None | ||||||
| userlevel | CDATA | None | ||||||
| onmouseup | CDATA | None | ||||||
| id | ID | None | ||||||
| wordsize | CDATA | None | ||||||
| scope | 
                        
  | 
                     None | ||||||
| onmouseover | CDATA | None | ||||||
| align | 
                        
  | 
                     None | ||||||
| lang | CDATA | None | ||||||
| xreflabel | CDATA | None | ||||||
| valign | 
                        
  | 
                     None | ||||||
| xml:base | CDATA | None | ||||||
| revision | CDATA | None | ||||||
| onkeypress | CDATA | None | ||||||
| onmousedown | CDATA | None | ||||||
| security | CDATA | None | ||||||
| onclick | CDATA | None | ||||||
| title | CDATA | None | ||||||
| class | CDATA | None | ||||||
| width | CDATA | None | ||||||
| conformance | NMTOKENS | None | ||||||
| headers | IDREFS | None | ||||||
| nowrap | 
                        
  | 
                     None | ||||||
| dir | 
                        
  | 
                     None | ||||||
| bgcolor | CDATA | None | ||||||
| colspan | CDATA | "1" | ||||||
| rowspan | CDATA | "1" | ||||||
| charoff | CDATA | None | ||||||
| remap | CDATA | None | ||||||
| style | CDATA | None | ||||||
| onmousemove | CDATA | None | ||||||
| onmouseout | CDATA | None | ||||||
| height | CDATA | None | ||||||
| xml:lang | NMTOKEN | None | ||||||
| char | CDATA | None | ||||||
| revisionflag | 
                        
  | 
                     None | ||||||
| vendor | CDATA | None | ||||||
| condition | CDATA | None | 
Identifies a “head” entry in an HTML table.
The following elements occur in th:
                  abbrev, acronym, action, anchor, application, author, authorinitials, beginpage, bibliolist, biblioref, calloutlist, caution, citation, citebiblioid, citerefentry, citetitle, classname, classsynopsis, cmdsynopsis, code, command, computeroutput, constant, constructorsynopsis, corpauthor, corpcredit, database, destructorsynopsis, email, emphasis, envar, errorcode, errorname, errortext, errortype, exceptionname, fieldsynopsis, filename, firstterm, footnote, footnoteref, foreignphrase, formalpara, funcsynopsis, function, glosslist, glossterm, graphic, guibutton, guiicon, guilabel, guimenu, guimenuitem, guisubmenu, hardware, important, indexterm, informaltable, inlineequation, inlinegraphic, inlinemediaobject, interface, interfacename, itemizedlist, keycap, keycode, keycombo, keysym, link, literal, literallayout, markup, medialabel, mediaobject, menuchoice, methodname, methodsynopsis, modespec, mousebutton, nonterminal, note, olink, ooclass, ooexception, oointerface, option, optional, orderedlist, orgname, othercredit, package, para, parameter, personname, phrase, productname, productnumber, programlisting, programlistingco, prompt, property, quote, remark, replaceable, returnvalue, revhistory, screen, screenco, screenshot, segmentedlist, sgmltag, simpara, simplelist, structfield, structname, subscript, superscript, symbol, synopsis, systemitem, table, termdef, tip, token, trademark, type, ulink, uri, userinput, variablelist, varname, warning, wordasword, xref.