Mine

<?xml version="1.0"?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
	targetNamespace="http://www.neuroponic.com/"
	xmlns="http://www.neuroponic.com/"
	elementFormDefault="qualified">
	<xs:element name="webpage">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="name" type="xs:string"/>
				<xs:element name="description" type="t_description" />

			</xs:sequence>
			<xs:attribute name="lang" type="xs:string" default="en" />
		</xs:complexType>
	</xs:element>

	<xs:complexType name="t_description" mixed="true">
		<xs:sequence>
			<xs:group ref="html" />
			<xs:group ref="custom_commands" />
		</xs:sequence>
	</xs:complexType>


	<xs:group name="custom_commands">
		<xs:choice minOccurs="0" maxOccurs="unbounded">
			<xs:element name="categ" type="xs:string" />
			<xs:element name="elink">
				<xs:complexType>
					<xs:simpleContent>
						<xs:extension base="xs:string">
							<xs:attribute name="href" type="xs:string" />
							<xs:attribute name="desc" type="xs:string" />
						</xs:extension>
					</xs:simpleContent>
				</xs:complexType>
			</xs:element>
		</xs:choice>
	</xs:group>

	<xs:group name="html">
		<xs:choice minOccurs="0" maxOccurs="unbounded">
			<xs:element name="br"/>
			<xs:element name="i" type="xs:string"/>
		</xs:choice>
	</xs:group>
</xs:schema>