1 There are three common personalized recommendatory technologies: information retrieval and extractor, content-based filtering and collaborative filtering, data mining and knowledge discovery.

2 Recommendatory standards: consisting of rules, guidances, graphic symbols, general requirements and so on.

3 The recommendatory principle and method by the authors are also adapted to high speed train.

4 The compose of Chinese recommendatory bibliographies had an outstanding role in the history of Chinese bibliography.

5 Recommendatory notes on the use of lliese documents are also presented.

6 The model is applied in 7th chapter to evaluate allocation plans of Heihe River Basin water resources,[] and offers recommendatory allocation plan.

7 Considering the subjective and objective factors, the trust was acquired by subjective trust, directive trust and recommendatory trust.

8 All of them, collaborative filtering is regarded as most popular and successful personalized recommendatory algorithm in personalized recommendation system.

9 Thesaurus concept hierarchy collaborative filtering algorithm improves search efficiency and quality of recommendatory results significantly which is proved by elementary test and analysis.

10 National standards and trade standards are divided into compulsory standards and recommendatory standards.

11 Clause 4.3 in this Standard belongs to obligatory rule, and others to recommendatory.