Hybrid libraries are known as a useful model for the library evolution. Whereelectronic and paper-based information sources are used alongside each other, the hybrid libraryconcepts exposes to discussion. This issue has entexed the parlance of the library and informationprofession in the 1990s. These libraries viewed as a halfway step towards the fully digital library.rn What is missing in the concept is object information sources.rn The challenge associated with the management of the hybrid library has been addressed bymany researches. Most of them believed this to be helping end-user in resource discovery andinformation use，in a variety of formats and .from a number of local and remote sources. Aseamlessly integrated method is adopted to reach this main goal. Data integration has been a dynamicand challenging research area for many years to provide users with a uniform interface to access，relate and combine data. The missing point in hybrid libraries is another types of informationsources which are located some places other than libraries. These institutions such as museums,libraries, archives and etc also offers information services and have interrelated information and hasoverlaped data which expose them to integration studies in recent years. Taking into considerationthat firsly, hybrid library's principles are likely to spread to any types of library and informationservices, and secondly information services consist of many types such as object oriented ones it is ofhigh possibility to change the hybrid libraries role into ternary ones in which print materials, digitalmaterials and objects are going to be seen as a body of knowledge.rn In this paper we propose a ternate approach to organization and service integration which webelieve hybrid libraries are moving toward it in a few years. The signs and traces of this movementcan be seen in some integration projects. This proposition may have the potential to come to a modelof ternary libraries.
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