Abstract: Under the guidance of HNC theory, coordination with overt conjunctions (COC) in 3613 sentences of 30 articles in the Chinese patent literature is annotated in the eight aspects, namely number, level, semantic type, semantic feature, interference, structural feature, contextual words and boundary position. This paper counts and analyzes the types and distribution of COC, investigates semantic similarity, structural similarities and contextual information.Its aim is to design the strategies, algorithms and linguistic rules for automatically recognizing COC in nominal groups of Chinese patent literature.

Key words: Linguistics, Chinese patent literature, COC, semantic chunks, semantic features