隨著網際網路與資訊技術的興起，數位學習的概念也因此應運而生，為了使不同之教學內容及教學法能夠在不同平台上被存取及執行，有許多國際組織正積極的訂定標準規範來解決這樣的問題，像是IEEE LOM 和ADL SCORM 訂定了數位內容標示規則。但是由於這種以內容導向為主的數位學習，學習者僅能以直線式的來閱讀數位教材，缺乏同儕間的互動及情境式學習。全球學習聯盟(IMS)訂定了一套學習設計語言(Learning Design, LD)並希望透過這種通用且具彈性的描述方式來支援線上學習情境中所使用的許多不同教學法，讓教學者可描述許多不同的教學情境、學習活動和互動方法來跳脫直線式的學習方式。為了幫助教學者設計符合LD 規範的學習設計文件，許多學習設計工具因此產生。但是每製作一份LD 文件就必須重新設計，明顯的缺乏效率。此外，一般學習設計工具並不提供LD 文件的正確性驗證，所以無法確保每份LD 文件均能順利的被執行。因此，為了提升設計時之效率及文件的正確性，如何搜尋、重複利用學習設計文件和驗證文件將會是重要的問題。基於這些原因，在本論文中我們提出了一個可再利用之元件架構，將包含在各LD 文件中之角色、活動及環境等元件，透過搜尋模式及比對演算法找尋可用的元件提供給設計者重複使用，以減少設計一份LD 文件的複雜度；另外，我們提出學習設計文件驗證規則來驗證LD 文件之正確性，以確保在執行時的流暢。

With the rise of the internet network and information technology, most of e-learning
researches devoted themselves to the exchange and interoperability of various
educational materials such as LOM and SCORM recently. The developed of IMS
Learning Design (LD) provides a generic and flexible specification language which
lets variety of pedagogic model or learning scenario can transfer, reuse and execute on
different learning system. The problem is that the teacher does not know how to design
and reuse learning activities, or how to carry out their learning scenario. The objective
of this thesis is to present a learning design (LD) toolset to enhance IMS LD reusability
through LD document and component retrieval, modification, composition, and
verification. We purpose a learning design finder to help instructors to locate learning
design documents. If an exactly matched learning design document can be found, the
instructors can directly reuse the matched learning design document. If only partially
matched learning design document can be found, then our toolsets provides a learning
design composer to guide instructors to compose a new learning design document to fit
instructors’ needs. Therefore, the newly found and modified learning design documents
will be verified based on verification rules before they can be fully reused.

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