object oriented database management system pdf

The evolving problem of new psychoactive substances (NPS) led to more complex chemical definitions in the field of narcotic drug regulation. We define a use-case for this kind of database application as shown in Figure 1.įigure 3: Picture Screenshot OBW Crotylsarin. But the more complex substance group definitions are usually not or not suitably represented in chemical databases. Some properties were hard-coded, such as the structure definitions of the NpSG.īut the implementation of chemicals legislation can be challenging. Some rules can also be calculated from the molecular formula, such as the gas volume in the case of complete combustion. An example of a requirement for a chemical database that can also apply chemical logic is the transfer of properties of substructures to the given overall structure, e. To keep the knowledge about chemicals adequately up-to-date and available, databases are reasonably used.

Some of these substance definitions in regulatory texts include numbers of substances in the order of magnitude of tens of thousands of substances (for CWC 1A1) up to 1017 substances (for CWC 1A13, 1A14).

Many others use different identifiers as well as varying levels of generalization as definitions of substance groups which are or can be displayed as Markush structures. Some of these regulations use single-substance lists. If chemicals are part of a criminal investigation, it can be essential to identify which substances are regulated by which law.

the UN conventions on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on their Destruction (Chemical Weapons Convention, CWC) or national narcotic drug laws, as well as environmental regulations. This advanced module, in contrast, deals with implementation aspects of relational systems as well as to the internal structure and performance issues related to DBMS and tests the candidates‟ knowledge of the current enhancements to relational database systems, object oriented database,datamining, data warehousing etc.The use of certain chemicals for trading, industrial or personal purposes is regulated by international conventions and national laws, e.g. These introductory units tend to concentrate on the use of relational database systems. Units introducing database concepts are now an accepted part of most computer science courses. Database management systems are standard tools that enable the storage and retrieval of data within modern information systems.

Object oriented database management system pdf