When we want to develop an interoperable repository of learning objects we must know the most important specifications and standards in this filed. The vast majority of these norms are based on Web services and SOA, so their knowledge is essential.
As we have seen in the preceding sections, the proliferation of these standards and specifications focused on the interoperability of learning object repositories is very wide-ranging. As a conclusion we can say that the building of a totally interoperable repository of learning objects, which will consequently allow the learning objects it contains to be reused, must comply with a series of very clear norms. In line with the norms set out above, the steps to be followed in order to achieve an interoperable repository may be summarized as follows:
1. A service oriented architecture should be used when analysing and designing the system software that will house it.
2. In order to integrate the repository in a federated search system, the SQI and SPI specifications should be adopted.
3. Steps 1 and 2 complement each other since, as they both use an SOA architecture, it is extremely easy to integrate the services offered by SQI or SPI.
4. Packaging learning objects using specifications like IMS Common Cartridge and describing their metadata will make those objects reusable.
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