Parse a string containing LEMS XML text.

        @param xmltext: String containing LEMS XML formatted text.
        @type xmltext: str

def parse(self, xmltext):
        """
        Parse a string containing LEMS XML text.

        @param xmltext: String containing LEMS XML formatted text.
        @type xmltext: str
        """
        
        xml = LEMSXMLNode(xe.XML(xmltext))

        if xml.ltag != 'lems' and xml.ltag != 'neuroml':
            raise ParseError('<Lems> expected as root element (or even <neuroml>), found: {0}'.format(xml.ltag))
        '''
        if xml.ltag == 'lems':
            if 'description' in xml.lattrib:
                self.description = xml.lattrib['description']
        '''

        self.process_nested_tags(xml)