crates/nornir-auth-saml/tests/fixtures/c14n_doc.xml
<root xmlns="urn:d" xmlns:a="urn:a" xmlns:b="urn:b" xmlns:unused="urn:u" xmlns:xs="urn:xs">
<a:x b:attr2="2" attr1="1" a:attr3="3" xmlns:c="urn:c"><c:y/>text & < > 
 end<empty></empty><b:z q=""	

<&'"/><!-- dropped --></a:x>
<inner xmlns=""><deeper k="v"/><d:again xmlns:d="urn:d2"><d:more/></d:again></inner>
<plain>default-ns child<a:mixed xmlns:a="urn:a">same a</a:mixed><a:changed xmlns:a="urn:a2"/></plain>
<typed xmlns:xsi="urn:xsi" xsi:type="xs:string">v</typed>
<?pi some data?>
</root>