by Penny P
In this article, the author talks about how RFIDs (Radio Frequency Identification) uses Entity-Relation models to manage its data. With the use of RFIDs, it allows objects to automatically collect information so it makes things easier and more efficient for those who use it. The data for the RFIDs changes frequently and it requires the use a data model so that it can perform certain functions such as tracking and monitoring information. The ER Models allow the RFIDs to collect and obtain data that they can use for tracking and identifying the history and real time information. There are several ways to use the ER Models for the RFIDs. One way is to model the data as events. In the article, it mentions that the RFIDs used by Sun Java System models the static entity types into three different tables: one for the entity type, the second for specific attributes of the entity, and the third for the parent/child relationships. The dynamic data is stored in a different log where they are always associated with timestamps. Another use of the ER Model is though DRER (Dynamic Relationship ER Model). This an extension of the regular ER Model that adds a dynamic relationship. The addition of dynamic relationships can generate events and generate state history.
This article was insightful because it shows how ER Models can be used in the real world. Not only can they map out static events, but with the use of the DRER, it can map out data that can change constantly. I thought it was interesting to see how people can extend the ER Model beyond its static relationship and incorporate the dynamic.
Bai, K., Li, S., Tian, J. (2011). Communication Software and Networks (ICCSN). (September 2011) P. 482-488. Retrieved from http://0-ieeexplore.ieee.org.opac.library.csupomona.edu/stamp/stamp.jsp?tp=&arnumber=6014315.