The main problem in the semantic technology today is semantic metadata extraction and description. There is no general method used to extract any type of semantics. The main objective of this research is to analyze existing methods that are used for describing and extracting semantic metadata and to design a metadata extraction system for Lithuanian. The quality analysis of designed system is carried out according to ISO/IEC 9126 standard. The objective of this standard is to provide a framework for the evaluation of software quality. ISO/IEC 9126 does not provide requirements for software, but it defines a quality model, which is applicable to every kind of software.