(Chapter-8)
1.Define the term data dictionary. Define metadata.
Data dictionary is a reference one of data which represents the same data itself.Metadata is a set of data that describes and gives information about other data.
2. What are four reasons for compiling a complete data dictionary?
The four reasons for compiling a complete data dictionary are as follows:
a.Check the dataflow diagram for completeness and accuracy
b. Providing a starting point for developing screens and reports
c.Determing the contents of data stored in files and
d.To develop the logic for data flow diagram process
3. What information is contained in the data repository?
The data repository contains information which is about the data maintained by the system including data flow diagrams, data stores, etc. It also contains procedural logic and use cases; screen and report design; data relationships; project requirements and project management information, such as delivery schedules, etc.On a whole it contains everything about data flow diagrams which makes a system work better
4. What is a structural record?
The reason for structural record is to be created is that when data flow base elements are grouped simultaneously
5. List the eight specific categories that each entry in the data dictionary should contain. Briefly give the definition of each category.
The eight specific categories that each entry in data dictionary should contain mandatorily are as follows:
a.Element ID- This is an optional one which can be assigned or not
b.The name of the element -this is a unique way to name the element in the data dictionary.
c.A description of the element- this describes what the element is like and what it type does.
d.The type of data -this shows if ...
... middle of paper ...
...used to determine whether the XML document content is valid (whether it confirms to the order and type of data that must be present in the document) or not
16. How does a document type definition help to ensure that an XML document contains all necessary elements?
It validates the XML document using standard XML tools. The DTD is easier to create if a data dictionary has been completed.
17. When should attributes be used in an XML document?
The situation of using attributes in an XML document is when the keyword #REQUIRED is present. Whereas #IMPLIED means that an attribute is optional
18. What does an ID attribute ensure?
The ID attribute ensures to check and make sure an ID starts with a letter or an underscore and cannot be by a number
19. What does an IDREF attribute validate?
IDREF links one element with another which is usually termed as ID
The subsequent sections provide detailed data information and example scenarios for each of the three types.
External schemas at the external level to describe the various user views. Usually uses the same data model as the conceptual schema.
The raw data which I have been given is in list form and provides me
Completeness: All documents are identified with a unique number and have a numerical sequence checked.
There are some basic characteristics that result from this definition and they are the following:
These are some of the attributes which are added in the ECS 2 with the interface.
o The terms of the classification tell us what the individuals in that class have in common.
a.) What is the definition of each one according to the book? Define each concept.
A database is a structured collection of data. Data refers to the characteristics of people, things, and events. Oracle stores each data item in its own field. For example, a person's first name, date of birth, and their postal code are each stored in separate fields. The name of a field usually reflects...
1. If I were to design Ben & Jerry’s data warehouse I would use several dimensions of information. The first dimension would consist of the company’s products; ice cream, frozen yogurt or merchandise. The marketing department has to know which products are selling, if Ben & Jerry’s didn’t know that their T-shirts are selling out as soon as they hit the stores, then they wouldn’t be able to take advantage of the opportunity to sell the shirts. The second dimension would consist of the different areas of sales; US, Canada, Mexico, or Europe. I am not sure if they sell their ice cream in Mexico, but with data collection they can find out if their ice cream would be a better seller in the hot climate, rather than pushing for greater distribution in Canada. The third dimension would consist of the “specifics”; where the sale was made, when the sale was made, and who purchased the product. This information can help in the design of the product to focus on the buyer; it can tailor flavors to seasons, and packaging to buyer who looks for the better-looking product. If Ben & Jerry’s could know when a season was coming to an end in a specific area, then they could forecast the need or the decline in need and speed up, or slow down distribution to those areas. The focus of the information is that it needs to be useful, and almost any information is useful.
5. The eye symbol signifies that you will be working with objects that could be
1.) Dimension - is any part of and object or event that can be measured.
Register, R. (2013). The importance of metadata for E-content. EContent Quarterly, 1(1), 30-44. Retrieved from http://search.proquest.com/docview/1467943727?accountid=10043
Bulterman, D.C.a., “Is it time for a moratorium on metadata?” IEEE Multimedia 11, no. 4 (October 2004): 10-17 (Bulterman, 2004)
Section 3) to extract meaning or context from the data in order to perform tasks in the