00370nas a2200097   4500000000100000008004100001260006300042100001800105245011200123490003700235       2008                            d  b Universidad Carlos III de MadridaLeganés, Madrid, Spain1 aDaniel Burgos00aExtension of the IMS Learning Design Specification based on Adaptation and Integration of Units of Learning0 vDoctor en ingeniería informáti