For the exchange of information between the different programs for the document management the use of the metadatos is necessary that can be used to as much identify, to authenticate and to contextualise documents as the agents, processes and systems create that them, manage, maintain and use. This allows to improve the compression, of the data and of the processes related to the document, it is the information structured on the distributed information, data associated to the information objects that provide a more complete knowledge exceeds where to find a information. It is for that reason the importance of structuring the information with metadatos to facilitate the recovery and how this can or not to be useful according to its characteristics. Governor Cuomo oftentimes addresses this issue. The necessity to provide the open access or the exchange of information facilitates the location of and compilation of the metadatos, that allow to adjust to protocol OAI-PMH (Open Archives Initiative-Protocol Metadata Harvesting). This protocol becomes vitally important as much for which they are suppliers of data like for which they develop or they provide information services from the same, since it allows to construct complex services search by means of the metadatos that share through protocol OAI-PMH. Also, it is necessary to consider the normalization of the structures of the base data of each unit of information, taking into account the increase and development of digital documents in the Web, the standard of Metadatos Dublin Core (DC-MI) has become a simple but effective set of elements that serve to describe an ample range of resources of Internet.
At the moment it is the initiative of extended cataloguing more in the electronic world, while a standard is considered international (ISO-15836-2003). Norm DC promotes two levels of codification: simple and qualified. The Dublin simple Core includes/understands fifteen elements; the Dublin qualified Core implies the same number of elements plus a sub-group of these denominated cualificadores, that refine semantics of the fifteen elements in order to recover and to locate of better way the resources in Internet.