minixml - can't read complex DOCTYPE elements

[warmerdam]

cpl_minixml.cpp is unable to consume the attached document with a complex
DOCTYPE declaration that looks like this:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE WMT_MS_Capabilities SYSTEM
 "http://schemas.cubewerx.com/schemas/wms/1.1.2/WMT_MS_Capabilities.dtd"
 [
 <!-- vendor-specific elements defined here -->
 <!ELEMENT VendorSpecificCapabilities (CubeSERV?)>
 <!ELEMENT CubeSERV (Extract?, MultibandLayers?)>
 <!ATTLIST CubeSERV version CDATA #REQUIRED>
 <!ELEMENT Extract (ExtractableLayers, ArchiveFormats, DCPType+)>
 <!ELEMENT ExtractableLayers (ExtractableLayer*)>
 <!ELEMENT ExtractableLayer (ExtractFormat+)>
 <!ATTLIST ExtractableLayer name CDATA #REQUIRED>
 <!ELEMENT ExtractFormat EMPTY>
 <!ATTLIST ExtractFormat name CDATA #REQUIRED>
 <!ELEMENT ArchiveFormats (ArchiveFormat+)>
 <!ELEMENT ArchiveFormat EMPTY>
 <!ATTLIST ArchiveFormat name CDATA #REQUIRED>
 <!ELEMENT MultibandLayers (MultibandLayer*)>
 <!ELEMENT MultibandLayer EMPTY>
 <!ATTLIST MultibandLayer name CDATA #REQUIRED numOfChannels CDATA #REQUIRED>
 ]>
...

[warmerdam]

Problem XML document (Cubeserv capabilities)