Abstracts which are written perfect as secondary works must be copyrighted, but such abstracts never exist. Abstracts are likely written the way they invite audience to refer to the original works, so that they are not copyrighted. Thus abstracts are available too on homepages. Therefore, CD-ROM searching on the Internet is prohibited. What happened to copyright of works which are downloaded from the Internet.
T here exist two types of works loaded on the Internet, copyrighted ones and non-copyrighted ones.
Users need to pay for the former ones, and are prohibited to distribute or process them for their own. On the contrary to that, non-copyrighted information such as news, table of contents, bibliographic data, are available for anybody to download and use. According to the investigation the Agency for Cultural Affairs made, there has not existed such a judicial precedent. Here comes again the matter that non-copyrighted databases are available for anybody to download them and transmit through electronic mailing without the copyright infringement. Other people are anxious to know how to make bibliographic description when they cite documents downloaded through the Internet into their papers.