DO NOT REPLY [Bug 14531] New: - XML Serialization: standalone attribute should not be suppressed when no public/system id

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14531

XML Serialization: standalone attribute should not be suppressed when no public/system id

           Summary: XML Serialization: standalone attribute should not be
                    suppressed when no public/system id
           Product: Xerces2-J
           Version: 2.2.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Serialization
        AssignedTo: xerces-j-dev@xml.apache.org
        ReportedBy: simon@ecnetwork.co.nz


Currently, the XMLSerializer class outputs the "standalone" attribute of the
<?xml ...?> prolog if-and-only-if the public and system identifiers being output
in the DOCTYPE tag are null.

It seems to me to be perfectly valid to have standalone="yes" AND public/system
IDs. The relevant section of the xml spec is: http://www.w3.org/TR/REC-xml#sec-rmd
No mention is made here of forbidding standalone=yes when a DTD ID is given in
the DOCTYPE tag.

If a document has DTDs specified via public or system ID:

standalone="yes" --> the DTD must be read if-and-only-if validation is enabled.
(ie DTD can be ignored if validation disabled, a good optimisation!)

standalone="no" --> the DTD must always be read, even if validation is disabled,
                because there are default values for attributes, etc. which must
be applied even though the document validity is not being checked.

Suggested changes:
XMLSerializer line 1414: remove check for doctype attributes
OutputFormat: change javadoc for setStandalone method

In addition, it would be nice to have an omitStandaloneDeclaration attribute on
the OutputFormat (defaulting to true), which would suppress "standalone='no'"
output, but not suppress "standalone='yes'". This would allow the caller to
decide whether they want the explicit (but technically redundant)
standalone='no' specifier to be output or not. This is somewhat inconsistent
with the way omitXMLDeclaration and omitDoctypeDeclaration are currently used
(but see my other bug entry re XMLSerializer and OutputFormat usage, which
suggests a fix for this).

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