Data Manipulation Language

  • Hideko S. Kunii


This chapter describes the Data Manipulation Language (DML). The Elementary Data Language discussed in Chap. 2 provides a useful repertoire of operations on network structure. Like an assembly language, however, it is tedious to write queries in the Elementary Data Language. To provide a user with a higher-level language facility, we have designed a DML on top of the Elementary Data Language. The DML defines rules for composition of Elementary Data Operations. The design goals of DML are summarized as:
  • — Easy to write queries.

  • — Aid the user to construct efficient queries.

  • — Precise definition of each DML statement.


Record Statement Link Statement Link Operator Link Type Record Type 


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Copyright information

© Springer-Verlag Tokyo 1990

Authors and Affiliations

  • Hideko S. Kunii
    • 1
  1. 1.Software Division Ricoh Co, Ltd.TokyoJapan

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