Semantic data models for database systems provide powerful tools to assist database administrators in designing and maintaining schemas, but provide little or no direct support for users of the database. Some research has been done on mapping user models of a domain to the underlying database using semantic schemas. Little has been done, however, on mapping conceptually meaningful data structur...

The aim of this paper is to investigate morphological and syntactical levels of sentences of Croatian Language. Morphological grammatical level is represented by 16 categories and 47 features with theirs value. Syntactical level is represented with constituent structure trees of sentences. Database has 1001 grammatical sentences of Croatian literature. Database of sentences is the result of the...

FAD is a powerful and simple language designed for a highly parallel database machine. The basic concepts of the language are its data structures (which we call objects) and its programs (defined in terms of operators and predicates). The primary features of the language are (i) the support of complex objects with built-in notion of object identity; (ii) an abstract data type capability; (iii) ...

A language for databases with sets, tuples, lists, object identity and structural inheritance is proposed. The core language is logic-based with a xpoint semantics. Methods with overloading and methods evaluated externally providing extensibility of the language are considered. Other important issues such as updates and the introduction of explicit control are discussed.

In this paper we present the main features of a deductive database language named INDALOG based on the integration of functional and logic paradigms. As most deductive database systems, INDALOG allows the handling of negation, higher-order functions, grouping operators, support for aggregation, handling of non-ground facts, and support for indexing structures on both extensional and intensional...

This paper analyzes different options for semantic database schema definition and describes a presentation format XSDL. Presentation of semantic database in a certain format implies that the format fully preserves the database content. If the database is exported to this format and then imported back to the database engine, the resulting database should be equivalent (Rishe, 1992) to the one th...

In this essay we examine the gap between database and programming language research and practice. Relational databases and object-oriented programming have been great success stories over the last 40 years. While the database community works hard to improve and extend database capabilities, it does not seem to pay much attention to how databases are actually used. We still use query languages t...

The approach of model-driven software development sketches the vision of the next big step in raising the level of abstraction and flexibility of programming tools. The key expectation behind MDA is achieving a productivity gain through the automating software construction based on models. In this paper we focus on one of possible model application, namely executable models. If models are to be...

The use of large-scale naturalistic data has been opening up new investigative possibilities for language acquisition studies, providing a basis for empirical predictions and for evaluations of alternative acquisition hypotheses. One widely used resource is CHILDES (MacWhinney, 1995) with transcriptions for over 25 languages of interactions involving children, with the English corpora available...

We present a two-layer language for the specification of database evolution in terms of transaction-based, dynamic integrity constraints. The first language layer is based on first-order logic and it is used to express dynamic constraints in terms of queries on the transaction history of a database. The second layer uses a customizable combination of text and graphics and its semantics are defi...