On the one hand, the inclusion problem for nonerasing and erasing pattern languages is undecidable; see JSSY95]. On the other hand, the language equivalence problem for NE-pattern languages is trivially decidable (see Ang80a]) but the question of whether the same holds for E-pattern languages is still open. It has been conjectured by Jiang et al. JSSY95] that the language equivalence problem fo...

On the one hand, the inclusion problem for nonerasing and erasing pattern languages is undecidable (see JSSY93]). On the other hand, the language equivalence problem for nonerasing pattern languages is trivially decidable (see Ang80a]) but the question of whether the same holds for erasing pattern languages is still open. It has been conjectured by Jiang et al. JSSY93] that the language equival...

The proposed pattern language is a collection of authoring patterns that individual authors can use in creating e-learning courses. The pattern language reflects our experience in the e-learning industry. Some of the patterns are basic and fundamental and most tool-related patterns are folklores among the IT-savvy authors. Other patterns emerged from our observation of users’ authoring behavior...

Collaborative work is increasing in frequency and importance in business, academia, and communities. The knowledge behind what makes for a successful collaboration is also increasing but is normally focused on only one aspect of collaboration theory. The understanding of how successful collaborations are built is greatly improved by the creation of a unified framework that organises and transfe...

Architecture-centric software evolution enables change in a system’s structure and behaviour while maintaining a global view of the software to address evolution-centric tradeoffs. The existing solutions for architectural maintenance and evolution fall short of exploiting generic and reusable expertise to address recurring evolution problems. We present a pattern language as a collection of int...

In order to utilize high-performance XML tree pattern query (TPQ) for implementing of XQuery language effectively, it is necessary to analysis the query plan and identify tree pattern from it. In this paper, we extend the functional intermediate language FXQL, which is used to implement XQuery language, with an extended XML generalized tree pattern representation (GTP++). Then, we propose an XM...

A process for building an object-oriented framework based on a pattern language, both for the same domain, is proposed. This process includes several activities, as the identi£cation of the framework hot-spots, the framework design, implementation, and validation. All these activities are supported by the pattern language. Besides that, by using the process here proposed, the resulting framewor...