The research presents nuclear issue as the study of the conversion of bibliographic records process. Delimiting the object of study for understanding the conversion of analog bibliographic records to MARC 21 Bibliographic format, from the syntactic and semantic analysis of records described in patterns of descriptive metadata structure and content standards. The thesis of this research is that the syntactic and semantic principles of bibliographic records, defined by schemas describing and cataloging the display, in the standards of descriptive metadata structure and content standards, determine the process of converting bibliographic records MARC21 Format for Bibliographic. Based on this context, the proposition of this research is to develop a theoretical study of the syntax and semantics of bibliographic records, by the Linguistic bias, with Saussure and Hjelmslev, which subsidize the conversion of analog bibliographic records to MARC 21 Format for Bibliographic a computational interpreter . With this proposal, it is stated, as a general goal, develop a theoretical-conceptual model of syntax and semantics in bibliographic records from Saussureano hjelmslevianos and linguistic studies of the manifestations of human language, which is applicable to a computational interpreter aimed to conversion bibliographic records to MARC 21 Bibliographic format. To reach this goal it is through the following specific objectives, divided in two groups and directed respectively to the theoretical-conceptual model of syntactic structure and semantics of bibliographic records, and the conversion of their records process: explain the relationship between syntax and semantics of bibliographic in the light of linguistic aspects studied by Saussure and Hjelmslev, applicable to analog and digital media records; submit characteristic principles of syntax and semantics in bibliographic records; look through the available literature, the methods and procedures for conversion of bibliographic records to MARC 21 Bibliographic format; set method of image processing bibliographic records in analog optical character recognition (OCR) software; present computational interpretation technique that is focused on the conversion of analog bibliographic records to MARC 21 Bibliographic Format to consider the syntactic and semantic schemas. In view of the outlined objectives, the methodological approach of the research is based on a qualitative approach, exploratory, descriptive and experimental basis and uses the literature. As a result, it is expected to contribute significantly to the Information Science Similarly, considering social, inherent in human knowledge and the solution of the problem presented aspects. The greatest social benefit occasioned by this research relates closely, the aspects of sharing bibliographic records, and the possibility of extending access to the metadata of information resources represented by the various units of information. Contributions theoretically can be glimpsed on the development of issues related to syntactic and semantic aspects of bibliographic records, and involve, at one time, the interdisciplinary Information Science, Computer Science and Linguistics. Contributions in the practical field are identified by the study include the development of Scan for MARC, a computational interpreter that can be adopted by any institution wishing to make use of conversion databases of bibliographic records procedure, to MARC21 format Library from the description and visualization of bibliographic records (AACR2R and ISBD), that character is considered innovative research schemes.