Figure 1 nod DE Sys DE FINITION_EDT ypes, (ii) node/arc formalism is just a output is an XML FINITION_EDT system. The HDG _ sys ems that can components: HDG_EXECUTION. META-GLARE and its modules are developed as Java Applets (thus methods in Figure | are implemented by Java classes). em. It consists in four sub-components, to cope ypes, (iii) graph constraints, and set of node/arc types and —po TOR module manages the defini [INTERPRETER deals with the be generated by META-GLARE. with t (iv) C ssibly- ion of aspec n Figure 1, we show a simplified version of the architecture of META-GLARE. Oval es represent data structures, and rectangles represent computational modules. The TOR module supports system-designers in the definition of a new he definition of (i) attribute IG formalism (where a CIG of graph constraints). The document in the CIG FORMALISM LIBRARY. Globally, the the formalism of a new CIG s which common to all the HDG ACQUISITION, H t consists of theree sub- DG_CONSULTATION, and Figure 1. The (simplified) architecture of META-GLARE.