Arabic to English Law/Patents Law (general)

على الدائن إثبـات الالتزام وعلى المدين إثبات التخلص منه .

From Article 1 of Egypt's evidence law. Every definition I can find only defines دائن as a creditor (and مدين as a debtor). Here, though, دائن seems to mean "claimant" and مدين seems to mean "defendant." Any help would be appreciated.

http://www.cc.gov.eg/Legislations/Principle_Legislations/Law...