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HRL uses Mustache template syntax. Context variables are set as XML objects, where attributes are treated as variables and nodes as sections
For example, passing a object
<animals>
<animal name="Dog" color="yellow"/>
<animal name="Bird" color="green"/>
</animals>
To the template
<html>
{{#animals}}
<p style="color: {{color}}">{{name}}</p>
{{/animals}}
</html>
results
dog
bird
Document-level templates are processed after special tags, so data generated during tags processing (for example, from the database using DATAPACKET tag) could be used anywhere in the report.