is there a way to change the schema definition while generating xml file from
the infopath form.

for eg:
when we  use menu : File - extract from file (to get the xml output for the
designed form) .

The output we get (first 2-3 lines) is
<customer xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xd="http://schemas.microsoft.com/office/infopath/2003">

we have a requirement to get the xml output  like this.
- <customer xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://unity.com/dtd/inscust.xsd">

we need to specify our own location.
xsi:noNamespaceSchemaLocation="http://unity.com/dtd/inscust.xsd"> instead of
microsoft schema.

Is there any settings in infopath where we can change to get the required
schema location output.?

Thanks