240 Copyright © 2012, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 14 INTRODUCTION Content adaptation is the process of automatically modify the characteristics of the learning object educational contents, in order to enhance the user experience, considering her/his interests and specific mobile device. User adaptation implies a learner model and a personalization process in order to select and present to the learner contents appropriates to her current interests. In the other hand, the number and variety of mobile devices characteristics, makes very common to vary the details of format of images, image sizes, or bit- rate of media when delivering content to mobile Sergio Castillo Universidad de las Américas Puebla, México Gerardo Ayala Universidad de las Américas Puebla, México Content Adaptation in Mobile Learning Environments ABSTRACT In this paper, the authors present their proposal for adaptation of educational contents of learning objects to a particular mobile device and a specifc learner. Content adaptation in mobile learning objects implies user adaptation and device adaptation, and requires additional metadata categories in comparison with SCORM 2004. This learning object content model, ALMA (A Learning content Model Adaptation), inherits from the SCORM standard a subset of metadata categories, and extends it with three top level metadata categories for content adaptation, i.e., Knowledge, Use, and Mobile Device Requirements (Castillo & Ayala, 2008). For user adaptation, the authors developed NORIKO (NOn-monotonic Reasoning for Intelligent Knowledge awareness and recommendations On the move), a belief system based on DLV, a programming system based on Answer Set Programming paradigm. For device adaptation the authors designed CARIME (Content Adapter of Resources In Mobile learning Environments), which uses trans- coding and transrating to adapt media content to suit the device characteristics. DOI: 10.4018/978-1-4666-1791-9.ch014