Taking Shenzhen library for example,this paper first analyzed the category,time and source distribution of non-publication local literature,then discussed its detailed rules and characteristics of cataloguing,as well as the special subject catalogue database construction,finally put forward the proposals on the acquisition of non-publication local literature.

Multi-directory databases are an important part of the shared platform of heterogeneous databases.

This paper first analyses important significance of unified identity authentication, and then proposes that the design and implementation of directory database is very important in system .

The summary has introduced CALIS and thematic database establishment,have expounded the fact that builds the choice question of the management software of the storehouse,collection question,index question,data security and the copyright protection,follow-up question of database establishment.

This paper probes into the feasibility of carrying out the innovation from aspects of constructing the characteristic thematic database,establishing the documentation centre serving the government s policy-making,and realizing the resources sharing.

The establishment of Internet subject databases is one of the key contents of digital library.