Описание типов в XML-схеме
http://example.com/stockquote/stockquoteV11.xsd
<?xml version="1.0"?>
<schema targetNamespace="http://example.com/stockquote/schemas" xmlns="http://www.w3.org/2000/10/XMLSchema">
<element name="TradePriceRequest">
<complexType>
<all>
<element name="tickerSymbol" type="string"/>
</all>
</complexType>
</element>
<element name="TradePrice">
<complexType>
<all>
<element name="price" type="float"/>
</all>
</complexType>
</element>
</schema>
http://example.com/stockquote/stockquoteV20.xsd
<?xml version="1.0"?>
<schema targetNamespace="http://example.com/stockquote/schemas" xmlns="http://www.w3.org/2001/XMLSchema">
<element name="TradePriceRequest">
<complexType>
<all>
<element name="tickerSymbol" type="string"/>
</all>
</complexType>
</element>
<element name="TradePrice">
<complexType>
<all>
<element name="price" type="float"/>
</all>
</complexType>
</element>
</schema>