<?xml version="1.0"?>
<!-- test explicit namespace on all nodes -->
<ivoa:basicQuantity
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:acc="http://ivoa.org/Accuracy"
      xmlns:ivoa="http://ivoa.org/Quantity"
      xsi:schemaLocation="http://ivoa.org/Quantity BasicQuantity.xsd"
>
   <ivoa:metaData>
   	<ivoa:basicQuantity><ivoa:value>data</ivoa:value></ivoa:basicQuantity>
   </ivoa:metaData>
   <ivoa:ucd>meta.id</ivoa:ucd>
   <ivoa:integer width="4"/>
   <ivoa:value>1000</ivoa:value>
   <ivoa:accuracy>
       <acc:binSize><ivoa:integer width="2"/><ivoa:value>10</ivoa:value></acc:binSize>
<!-- this will throw an error.. only "basicQ" inheriting accuracy elements allowed 
     here, BUT, If we were to inherit from StandardQ schema, we COULD use it (see 
     example 17)
 -->
<!--
       <acc:binSizeList size="2"><ivoa:integer width="2"/><ivoa:values>10 20</ivoa:values></acc:binSizeList>
-->
   </ivoa:accuracy>
</ivoa:basicQuantity>