l">XML Tools</a> download. Note that 
XSLT2 is required to run the schematrons. 
</p>
<p>
When running the schematron, use the file "fhir-invariants.sch". This
includes all the schematrons. The individual schematron files for each
resource are provided to allow implementers to build their own smaller
combined file that covers the relevant resource types for them.
</p>

<a name="json-schema"></a>
<h3>Using the JSON schema</h3>
<p>
The JSON schema can be used with JSON schema validation software.