<P> XHTML was developed to make HTML more extensible and increase interoperability with other data formats . In addition , browsers were forgiving of errors in HTML , and most websites were displayed despite technical errors in the markup ; XHTML introduced stricter error handling . HTML 4 was ostensibly an application of Standard Generalized Markup Language ( SGML ) ; however the specification for SGML was complex , and neither web browsers nor the HTML 4 Recommendation were fully conformant to it . The XML standard , approved in 1998 , provided a simpler data format closer in simplicity to HTML 4 . By shifting to an XML format , it was hoped HTML would become compatible with common XML tools ; servers and proxies would be able to transform content , as necessary , for constrained devices such as mobile phones . By using namespaces , XHTML documents could provide extensibility by including fragments from other XML - based languages such as Scalable Vector Graphics and MathML . Finally , the renewed work would provide an opportunity to divide HTML into reusable components ( XHTML Modularization ) and clean up untidy parts of the language . </P>
<P> XHTML was developed to make HTML more extensible and increase interoperability with other data formats . In addition , browsers were forgiving of errors in HTML , and most websites were displayed despite technical errors in the markup ; XHTML introduced stricter error handling . HTML 4 was ostensibly an application of Standard Generalized Markup Language ( SGML ) ; however the specification for SGML was complex , and neither web browsers nor the HTML 4 Recommendation were fully conformant to it . The XML standard , approved in 1998 , provided a simpler data format closer in simplicity to HTML 4 . By shifting to an XML format , it was hoped HTML would become compatible with common XML tools ; servers and proxies would be able to transform content , as necessary , for constrained devices such as mobile phones . By using namespaces , XHTML documents could provide extensibility by including fragments from other XML - based languages such as Scalable Vector Graphics and MathML . Finally , the renewed work would provide an opportunity to divide HTML into reusable components ( XHTML Modularization ) and clean up untidy parts of the language . </P>
20 . the main goal of extensible hypertext markup language ( xhtml ) is to
20 . the main goal of extensible hypertext markup language ( xhtml ) is to
to make HTML more extensible and increase interoperability with other data formats
to make HTML more extensible and increase interoperability with other data formats