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RE: MSXML DOM Special Chars Less Than 32


xml special char
Mark,

Chars 0-31 [#x0-#x1F] (except 9 [#x9], 10 [#xA], and 13 #xD]) are illegal in
XML.

[2]    Char    ::=    #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] |
[#x10000-#x10FFFF] /* any Unicode character, excluding the surrogate blocks,
FFFE, and FFFF. */

See http://www.w3.org/TR/REC-xml.html#charsets

Mike
-----Original Message-----
From: Mark Tucker [mailto:MTucker@i...]
Sent: Thursday, March 21, 2002 2:54 PM
To: xml-dev@l...
Subject:  MSXML DOM Special Chars Less Than 32


We are having trouble encoding special characters less than 32 (excluding 9,
10, and 13).  One server is creating an XML DOM and returning the XML as a
string.  The calling server is then getting this XML string and loading it
into a DOM.  The following VB test app shows that assigning a special
character to the Text property doesn't encode it in a way that a later call
to loadXML will work:

Dim xmldoc As MSXML2.DOMDocument
Dim xmldoc2 As MSXML2.DOMDocument
Dim strXML As String

For x = 1 To 255
    Set xmldoc = New MSXML2.DOMDocument

    Set pi = xmldoc.createProcessingInstruction("xml", " version='1.0'")
    xmldoc.appendChild pi

    Set e = xmldoc.createElement("test")
    e.Text = "chr(" & x & ")=" & Chr(x) & ";"
    xmldoc.appendChild e

    strXML = CStr(xmldoc.xml)

    Set xmldoc2 = New MSXML2.DOMDocument
    xmldoc2.loadXML strXML

    If xmldoc2.parseError.errorCode <> 0 Then
        Debug.Print x, "parseError:" & xmldoc2.parseError.reason
    End If

    Set xmldoc = Nothing
    Set xmldoc2 = Nothing
Next


The output is:

 1            parseError:An invalid character was found in text content.
 2            parseError:An invalid character was found in text content.
 3            parseError:An invalid character was found in text content.
 4            parseError:An invalid character was found in text content.
 5            parseError:An invalid character was found in text content.
 6            parseError:An invalid character was found in text content.
 7            parseError:An invalid character was found in text content.
 8            parseError:An invalid character was found in text content.
 11           parseError:An invalid character was found in text content.
 12           parseError:An invalid character was found in text content.
 14           parseError:An invalid character was found in text content.
 15           parseError:An invalid character was found in text content.
 16           parseError:An invalid character was found in text content.
 17           parseError:An invalid character was found in text content.
 18           parseError:An invalid character was found in text content.
 19           parseError:An invalid character was found in text content.
 20           parseError:An invalid character was found in text content.
 21           parseError:An invalid character was found in text content.
 22           parseError:An invalid character was found in text content.
 23           parseError:An invalid character was found in text content.
 24           parseError:An invalid character was found in text content.
 25           parseError:An invalid character was found in text content.
 26           parseError:An invalid character was found in text content.
 27           parseError:An invalid character was found in text content.
 28           parseError:An invalid character was found in text content.
 29           parseError:An invalid character was found in text content.
 30           parseError:An invalid character was found in text content.
 31           parseError:An invalid character was found in text content.


I tried playing with the encoding on the initial DOM document, but it has no
effect.

How do I properly encode these special characters?

Mark Tucker
mtucker@i...

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