Commit5cbd54e

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doc: document "IS NOT DOCUMENT"

Reported-by: scott.ure@caseware.comDiscussion:https://postgr.es/m/152056505045.4963.16783351661813640274@wrigleys.postgresql.orgAuthor: Euler TaveiraBackpatch-through: 10

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Original file line number	Diff line number	Diff line change
`@@ -10310,6 +10310,24 @@ SELECT xmlagg(x) FROM (SELECT * FROM test ORDER BY y DESC) AS tab;`
`10310`	`10310`	`</para>`
`10311`	`10311`	`</sect3>`
`10312`	`10312`
	`10313`	`+ <sect3>`
	`10314`	`+ <title><literal>IS NOT DOCUMENT</literal></title>`
	`10315`	`+`
	`10316`	`+ <indexterm>`
	`10317`	`+ <primary>IS NOT DOCUMENT</primary>`
	`10318`	`+ </indexterm>`
	`10319`	`+`
	`10320`	`+<synopsis>`
	`10321`	`+<replaceable>xml</replaceable> IS NOT DOCUMENT`
	`10322`	`+</synopsis>`
	`10323`	`+`
	`10324`	`+ <para>`
	`10325`	`+ The expression <literal>IS NOT DOCUMENT</literal> returns false if the`
	`10326`	`+ argument XML value is a proper XML document, true if it is not (that is,`
	`10327`	`+ it is a content fragment), or null if the argument is null.`
	`10328`	`+ </para>`
	`10329`	`+ </sect3>`
	`10330`	`+`
`10313`	`10331`	`<sect3 id="xml-exists">`
`10314`	`10332`	`<title><literal>XMLEXISTS</literal></title>`
`10315`	`10333`

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