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《汉语主题词表》问世已7年,这是我国的一部大型词表,收词10万多条,也是当今世界上收词最多的一部叙词表。《中国化学文献库》(CCDOC)就是根据这部《词表》中的主题词进行文献标引。目前已加工处理了化学文献3万余篇。实践表明,化学文献中最难于处理的还是大量的化学物质,现行的化合物组配规则存在一定的流弊和局限性,难以适应众多的化学物质,以致在标引化合物主题词特别是有机物时会出现难以克服的困难。
“Chinese Thesaurus” has come out for seven years, which is a large-scale Chinese vocabulary, received more than 100,000 words, but also in today's world received most of thesaurus. The Chinese Chemical Archive (CCDOC) is a literature reference based on thesaurus in this “glossary.” At present, more than 30,000 chemical literature have been processed. Practice shows that the chemical literature is the most difficult to deal with a large number of chemical substances, the existing compound rules with some drawbacks and limitations, it is difficult to adapt to a large number of chemical substances, resulting in the title compound compounds, especially organic matter will appear Difficult to overcome.