 or query the necessary
metadata. Alternatively, metadata is distributed in a so-called Data Structure
Definition (DSD) file, which is usually in
<a href="https://en.wikipedia.org/wiki/XML">XML</a> format.</p>
<p>For data validation, some aspects of the metadata are of interest. In
particular, code lists are interesting objects to test against. In validate
there are two ways to use SDMX codelists. The first is by referring to a
specific code list for a specific variable in an SDMX registry. The second way
i