If you have old records in (or , a linguistic extension of DC) you can use the following profile:
http://catalog.clarin.eu/ds/ComponentRegistry?item=clarin.eu:cr1:p_1288172614026
From that profile you can generate the XSD:
And then you can transform your DC XML files into files that comply with the profile with the following XSLT:
http://www.clarin.eu/cmd/xslt/olac2cmdi.xsl
An example (DC) inputfile:
http://infra.clarin.eu/cmd/example/conversion/input/oai_ota_oucs_0001.xml
The corresponding (CMDI) outputfile:
http://infra.clarin.eu/cmd/example/conversion/output/oai_ota_oucs_0001.cmdi