Reading for week #4

Database:

This article talks about Databases which is an integrated collection of logically related records or files consolidated into a common pool that provides data for many applications and it describe the types of databases which are Relational model ( most commonly used),Hierarchical model and Network model. Moreover it defines Database management systems .At the end of the article, talks about Storage structures, Transactions and concurrency, Locking, Applications and how all of these databases can take advantage of indexing. This article helps me a lot to understand more about database because I will have an assignment in other LIS class about databases.

Metadata:

This research talks about Metadata. Gilliland defines, describes and talks about different kind of metadata. Metadata is data about data. There are 4 types of metadata which are Administrative, Descriptive, and Preservation, Technical, and use metadata. Moreover Gilliland mentions the Attributes and Characteristics of Metadata and gives examples of them. Then at the end of the research, he talks about why is metadata is important. This reading let me understand more what does metadata mean, in the beginning of this semester I did not sure what does metadata mean and when I can use this world.

The Dublin core data model:

I did read this article but I still not understand what does Dublin core data model mean and what does it use for? Is it a language used to describe a metadata and is library use this kind of model. I am still not sure what this article about.