dynamic class instantiation

Hi, I have a "language definition" file, something along the lines of:

page ::
name : simple
caption : simple
function : complex

function ::
name : simple
code : simple

component ::
name : simple
type : simple
dataset : complex

etc.

On the other hand as input I have .xml files of the type:

<page>
<name>WebPage</name>
<caption>Browser Visible Caption</caption>
<component>
<name>Countrylist</name>
<type>dropdown</type>
<value>$dropdownlist</value>
<function>
<name>sqlSelect</name>
<code>select countries
from blah into $dropdownlist</code>
</function>
</component>
</page>

I have a parser that will go through the language definition
file and produce the following as a separate .py file:

class page(object):
def __init__():
self.name = None
self.caption = None
self.functions = []

class function(object):
def __init__():
self.name = None
self.code = None

Now I want to use something like xml.dom.minidom to "parse" the
..xml file into a set of classes defined according to the "language
definition" file. The parse() method from the xml.dom.minidom
package will return a document instance and I can get the node
name from it. Say I got "page" as a string. How do I go about
instantiating a class from this piece of information? To make it
more obvious how do I create the page() class based on the "page"
string I have? I want to make this generic so for me the language
definition file will contain pages, functions, datasets etc. but
for someone else mileage will vary.

Thanks,
Ognen
.

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