To enables the specification of assistance systems, we propose aLDEAS, a graphical language. An aLDEAS assistance system is defined by a set of assistance rules complying with a rule pattern. This language is enriched by several patterns that facilitate the definition of complex frequently used actions. aLDEAS is implemented in the SEPIA system, that mainly consists in an assistance editor and a generic assistance engine. Most existing applications can be monitored by SEPIA in order to provide end-users with contextualized and personalized assistance. We performed several experimentations both with assistance designers and end-users in order to assess our propositions.
language, knowledge representation, user assistance, rule-based system, epiphytic tools.
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