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However, because each of platforms may follow totally different standards and structures, when we need to collect information from the sites built by these platforms, it becomes complicated and costly.
It means that various metadata and data standards are not considered significantly, causing many difficulties in extending functions and collecting information
Also, there is no clear model structure for storing and querying a set of data collecting processes. As a result, it is difficult to manage effectively the collected metadata and data
That¡¯s why we propose here a new system named MMHS (Metadata Management and Harvesting System) used in our SODAS (Smart Open Data As a Service) platform.
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