 Wysłany: Pią 10:52, 08 Kwi 2011 Temat postu: XML data exchange technology in the electronic mon |
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| XML data exchange technology in the electronic monitoring system
Contains one of the PCDATA data, and with the Parent table through the Parent table's primary key association; for the table elements for each single-valued attributes, and only a single display of the simple child element , as the table of a deal , if the child element or attribute is Optional, is defined as allowing the blank ; for multi-valued attributes or child elements has occurred many times a simple , create a separate table to hold these values , and through the parent table primary key is connected to the parent table; for each A complex child element (which itself will be mapped into a table) , in the child element of the table to place the primary key of the parent element in the table . 2 ) If the Schema from a relational database, generate XMLSchema,MBT schuhe preise, then: for each table to create an element type; for the table, each non- foreign key columns of data , as the table element's attributes or simple sub- elements; the relationship between the level of self- reference Table , add a child element of the same name to handle the recursive case ; For each foreign key , add a foreign key table associated with the sub- elements. Name has not been involved in the conflict rules , data types and constraints and other issues, to solve these problems , need to take some of the more complex algorithms. 4 Conclusion agents with specialized data acquisition system , the electronic monitoring system from any administrative examination and approval system will be used to obtain the same external data processing, internal data conversion mechanism fully realized by the data acquisition agent , in line with the software 's high cohesion , low coupling Requirements of the future have a good e-government construction in China. |
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