You can then validate some Element Tree document against the schema.
You'll get back True if the document is valid against the Relax NG schema, and False if not: Note that this error log is local to the Relax NG object.
The most frustrating part of the process for me was getting the certificates set up correctly for testing.
Certificate logic - private and public keys - is something that's always been rather fuzzy in my mind and getting the keys set up properly in Windows is really quite a pain in the ass because there are a bunch of different options to do it.
lxml also provides support for ISO-Schematron, based on the pure-XSLT skeleton implementation of Schematron: There is also basic support for The parser in lxml can do on-the-fly validation of a document against a DTD or an XML schema.
The DTD is retrieved automatically based on the DOCTYPE of the parsed document.
The The usage of validation phases is a unique feature of ISO-Schematron and can be a very powerful tool e.g.
This means that the XML file itself must either contain a DTD or must reference a DTD to make this work.If you ever need to pass an XPath as argument to the XSLT stylesheet you can pass in an etree.XPath object (see XPath and XSLT with lxml: Stylesheet-parameters for background on this).When you create a key with Windows using the The latter step is optional but I prefer to assign a friendly key name so its easier to reference the key.The code below uses Friendly Names to retrieve the key. Subject (which is the same value as Issued To) is what key command line tools generally use to look up keys.At this point you should have a working certificate that you can use for digital signatures. There are a number of ways to do this and the process will vary based on how your original document is set up.