Name
XMLType.isFragment — The function returns 1 if the instance is an XML generic entity or 0 if it is a plain document.
Synopsis
XMLType.isFragment ( |
); |
Description
The function checks the number of children elements of the root of the document root of the given instance. If there are no such documents or there are many of them then the document is not well-formed, for example it can not be fully validated against an XML schema. However it can be used as a fragment of a larger document: it can be declared as an external generic entity and then referenced in a top-level document or in one of its subdocuments. For example a book can be stored in XML as a root document that includes subdocuments, one or more chapter per subdocument.
The function returns 1 if the given XMLType instance is a fragment and returns 0 if it is a well-formed XML document.
Return Types
Integer value 1 or 0.
Examples
Example24.555.Basic test
The table DB.DBA.SYS_USERS always contains more than one user record so the call of XMLAGG that returns one element per record creates an valid generic entity but not a valid document.
select XMLAGG (XMLELEMENT ("User",U_NAME)) from DB.DBA.SYS_USERS;
callret
VARCHAR
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<User>BACKUP</User><User>SOAP</User><User>dba</User><User>demo</User>
1 Rows. -- 00000 msec.
select XMLType (XMLAGG (XMLELEMENT ("User",U_NAME))).isFragment() from DB.DBA.SYS_USERS;
callret
INTEGER
_______________________________________________________________________________
1
1 Rows. -- 00000 msec.