Search results for "Data control language"
showing 5 items of 5 documents
LCL - A Graphical Meta-Language for Specification of Language Constraints
2015
The Object Constraint Language (OCL) is commonly used for constraints in meta-model-based language specifications. However, it may be advantageous to have a domain-specific constraint meta-language optimised for language specifications. A survey of OCL usage in language specifications has been performed, in order to gain an understanding of common constraint patterns. This is used as a starting point for defining a new meta-language for language constraints, Language Constraint Language (LCL), that has an intuitive graphical syntax.
Metadata-Oriented Language Model in Translingual Retrieval of Digital Data
2015
Translingual retrieval relies on processing a source language to retrieve digital document content in a target language. From the perspective of successful browsing digital catalogues, probability of retrieving the full text document in a language other than the query language is close to zero owning to the fact that it is not only the library collection, but especially a problem of matching the index terms with the query keywords which are assumed to be their translation equivalents. In addition, hardly any digital library system is incorporated with a translation component. As a result, such a matching is rather coincidental. Our approach to the translingual document retrieval problem is …
A query language for medical statistical analysis
1991
While standard query languages support primarily the definition of single queries, in the evaluation of medical studies one usually formulates large sets of interdependent queries. A set of this type is called an integrated transaction. Our system for the definition of integrated transactions is based on the observation that in medicine a large number of statistical evaluations is founded on a conceptional model that can be structured as a tree. We describe a screen oriented tree editor for the relational data base system DBase and report on our experience with its application in the evaluation of the success rate of PTCA interventions.
LanguageLab - A Meta-modelling Environment
2015
In the LanguageLab language workbench, we build on a component-based approach to language specification that facilitates the specification of all aspects of a computer language in a consistent manner, taking into account best practices in meta-modelling and language design. The workbench allows operation on a suitable abstraction level, and also focuses on user-friendliness and a low threshold to getting started, in order to make it useful for teaching of meta-modelling and language design and specification. The platform is open for third party language modules and facilitates rapid prototyping of DSLs, re-use of language modules, and experiments with multiple concrete syntaxes. The platfor…
Library for model querying
2012
Query and transformation languages make it easy to work with models, but they are bound to one particular data store. That makes them hard to adopt in projects where data is stored in a different repository, which hinders more widespread use of transformations and models. Instead of adopting a transformation language to a new data store, we propose to build a query and transformation library for the general-purpose language that is already used in a project. In this paper we demonstrate that it can be easily by implementing such a library for an EMOF-like data store in the Lua language.