Graph queries are an enabling technique in reverse engineering. As the Graph Exchange Language (GXL) is more and more accepted as standard exchange format, a common graph query language taking advantage of the features of GXL would be an important aid in reverse engineering. As a first step to such a common graph query language, this paper discusses and contrasts two graph query approaches, who...

This paper introduces a description logic query language for retrieving A-box individuals that satisfy specific conditions. The language is substantially more expressive than traditional concept-based retrieval languages offered by previous description logic reasoning systems. The new language is implemented in the Racer system. We demonstrate the applicability of nRQL (new Racer Query Language...

An essential property which is desirable in a query language designed for a certain data model is that queries issued in that language must produce results that are structured and modeled using the same data msdel. A consequence of maintaining this property in a query language is that the result of a query can be used as an operand in sc+ne other query (or queries) or can bs saved as a user's v...

ii Abstract This thesis proposes an object-oriented query language that is more powerful than many existing query languages. The language is formally speciied and its expressive power is demonstrated by giving four translation schemes from other prominent object-oriented query languages. Further, this query language can be supported by a query algebra and both the query language and query algeb...

The Deductive Object Query Language (DOQL) is a rule-based query language designed to provide recursion, aggregates, grouping and virtual collections in the context of an ODMG compliant object database system. This paper provides a description of the constructs supported by DOQL and the algebraic operational semantics induced by DOQL's query translation approach to implementation. The translati...

VISUAL is a graphical query language designed for scientific databases. VISUAL is icon-based and is suitable for domains where visualization of the relationships are important for the domain scientist to express queries. Graphical objects are not tied to the underlying formalism; instead, they represent the relationships of the application domain. VISUAL supports relational, nested, and object-...

KDD is a rapidly expanding field with promise for great applicability. Knowledge discovery became the new database technology for the incoming years. The need for automated discovery tools caused an explosion in the number and type of tools available commercially and in the public domain. These requirements encouraged us to propose a new KDD model so called ODBC_KDD(2) described in [39] ."One o...

With the rise of metaprogramming in Scala, manipulating ASTs has become a daily job. Yet the standard API provides only low-level mechanisms to transform or to collect information on those data structures. Moreover, those mechanisms often force the programmer to manipulate state in order to retrieve information on these ASTs. In this report we try to solve those problems by introducing TQL, a h...

Math search is a new area of research with many enabling technologies but also many challenges. Some of the enabling technologies include XML, XPath, XQuery, and MathML. Some of the challenges involve enabling search systems to recognize mathematical symbols and structures. Several math search projects have made considerable progress in meeting those challenges. One of the remaining challenges ...

The advent of the Virtual Observatory has begun an evolution in the space physics data environment. A number of nascent and discipline specific Virtual Observatories have started to emerge with an emphasis on data search and retrieval. As this new data environment takes shape an emphasis will be placed on interdisciplinary communication in attempts to address large scale and global problems. To...