Verifing document signed with X509 certificates.</a></span></dt>
</dl></div>
<div class="sect1">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="xmlsec-notes-x509-overview"></a>Overview.</h2></div></div></div>
<p>X509 certificate is one of many possible keys data object that can be
        associated with a key. Application may read and write X509 data
	from/to XML file. The X509 certificates management policies significantly
        vary from one crypto library to another. 