Processing Instruction: Difference between revisions

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== Syntax ==

An SGML processing instruction is enclosed within <code><?</code> and <code>></code>.<ref>{{cite book |title= SGML and HTML Explained |last= Bryan |first= Martin |publisher= Addison Wesley Longman |year= 1997 |url= https://archive.org/details/sgmlhtmlexplaine0000brya |isbn= 0-201-40394-3 |access-date= 2010-08-18 |url-status= dead |url-access= registration }}</ref>

An XML processing instruction is enclosed within <code><?</code> and <code>?></code>, and contains a ''target'' and optionally some content, which is the node value, that cannot contain the sequence <code>?></code>.<ref>{{cite book | title = The Internet encyclopedia, Volume 3 | url = https://archive.org/details/internetencyclop00bidg_359 | url-access = limited | author = Hossein Bidgoli | page = [https://archive.org/details/internetencyclop00bidg_359/page/n911 877] | publisher = John Wiley and Sons | year = 2004 | isbn = 0-471-22203-8}}</ref>