This paper makes some introductory and commentary remarks on the part-of-speech labeling of the Chinese headwords and the lexicographical significance of A New Century Chinese-English Dictionary.

The information extracting middleware module based on XML technology is given,step by word segmenting based on string match and string frequency stat,POS tagging based on heredity arithmetic theory,XML Template filling based on HMM model,that can reorganize the government archives with XML formatting rapidly.

This approach expands the POS tagging set based on the characteristic of answering text and the demand of key information distilling.

However, POS labeling in Chinese-English (C-E) dictionaries is a longstanding and complicated problem, which matters greatly as a minor step may lead to major consequences.

Symmetry in POS labeling and lexicographical translation in C-E dictionaries is not only an aesthetical principle for balance and harmony but also a scientific requirement for accuracy and objectivity.

This article elaborated importance about the language dictionary labelling part of speech,and the situation about the Chinese language dicionary labelling part of speech,unified the situation about Modern Chiese Dictionary and Modern Chinese Standard Dictionary labelling the part of speech,then evoluated their difference,proposed some suggestions on dictionary labelling part of speech views.

This paper proposes an approach of modifying the POS tag set, so the POS tag g will never be in this set.