If you do not like to change the files by hand, transformations of the xml files for the previous version can be done by using an xslt processor, such as xsltproc. Consult DocBook XSL: The Complete Guide for xslt processors. Usage with xsltproc and tidy (to make the output.xml more readable) is

  xsltproc convert_v0.2.3.xsl input.xml | tidy --indent yes -xml > output.xml

convert_v0.2.3.xsl is included in Ohmms-Example package or can be downloaded here.

Other useful xslt stylesheet is for external input files for particle sets. Use convert_ptclset.xsl is included in Ohmms-Example package or can be downloaded here. The usage is similar:

  xsltproc convert_ptclset.xsl input.xml | tidy --indent yes -xml > output.xml