XMLlib utility library

The xmllib library helps the reading and parsing of XML data in Fortran. It contains four distinct interfaces:

• The classic interface developed by Christian Konz. See the example in examples/classic/.
• The find_parameter interface developed by Michal Owsiak, which is a wrapper to the "classic" interface. See the example in examples/xpath/.
• The xmlget interface developed by Thomas Jonsson, which is a wrapper to the find_parameter. See the example in examples/xpath/.
• The xml2eg interface developed by Edmondo Giovannozzi, which is a wrapper to the libxml-2.0[^libxml2]. See the example in examples/xml2eg/.

The first three interfaces are kept for historical reason, it is highly recommended that new developments and users target the xml2eg interface only.

Some general limitations:

• these interfaces cannot handle xml-attributes.
• they cannot handle arrays of structures, e.g. /array[2]/value