DDXXMLBase

Description

Based on this recommendation: http://www.w3.org/TR/xmlbase/#syntax

We'll add the attribute xml:base to the dap:Dataset element.

The namespace associated with the xml prefix is: http://www.w3.org/XML/1998/namespace and the prefix MUST be declared in the dap:Dataset element:

<Dataset 
   xmlns="http://xml.opendap.org/ns/DAP/3.2#"
   xmlns:xml="http://www.w3.org/XML/1998/namespace"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://xml.opendap.org/ns/DAP/3.2#  http://xml.opendap.org/dap/dap3.2.xsd"
   name="200803061600_HFRadar_USEGC_6km_rtv_SIO.nc" 
   xml:base="http://dev1.opendap.org:8080/opendap/netcdf/examples/200803061600_HFRadar_USEGC_6km_rtv_SIO.nc.ddx"
>

Proposed Hyrax Implementation

To cause the BES to pass the xml:base to libdap for inclusion in the DDX we need to Implement either a get command parameter or a new context for setContext

setContext

   <setContext name="xml:base">valueOf(xml:base)</setContext>

get

 <get type="ddx" definition="d1" xml:base="valueOf(xml:base)" />