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Final

Computer Science 1032A/B Study Guide - Final Guide: Xml, Electronic Data Interchange, Open Standard


Department
Computer Science
Course Code
COMPSCI 1032A/B
Professor
Louis Magguilli
Study Guide
Final

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Computer Science 1032 – Class Notes
September 10, 2013
A computer is simply an box-shaped object with lights – it requires software to
function to its full capacity
Computers are only aware of electronic pulses (whether they are on or off – in
computer science, on = 1 and off = 0)
8 bits = 1 byte
1 bit is one pulse
Information is transmitted between computers by the Internet and the world wide
web
Computer is based off of this binary code: [1,0,1,0,0,1,1]
September 12, 2013
The Internet is an interconnection (transmission of pulses from websites), whereas
the world wide web contains web pages made from HTML and stores all
information on websites
Each site has a storage of web pages
Web pages are written in a code called HTML – this is displayed through web
browsers (such as Explorer or Firefox)
HTML (Hyper Text Markup Language):
Document tags
Formatting tags
Anchors, tables, lists
Information transmission in a computer: user components (user tier), DBMS
(database system – database tier), web browser (server tier)
When a purchase is made over the Internet, pulses are sent to an updated database
that records the order
HTML is the first markup language of the world wide web – it is used to deliver
content on the web, is an open standard, readable, portable and easy to use
Structure of HTML file: content and/or instructions
A web page must be published in order to be viewable online
Important types of HTML coding:
<p> = text in a paragraph
<center> = center the text
<HR> = horizontal rule
<h1> = header (1-6 from largest to smallest headers)
<br> = break
<b> = bold
<u> = underline
<i> = italics

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<img (SRC – source) / > = image
September 17, 2013
HTTP (hyper text transfer protocol)
FTP (file transfer protocol)
DBMS (data base management system)
SMTP (simple mail transfer protocol)
How to create a table in HTML:
<table> = create table
<tr> = table row (add additional tags for more table rows)
<td> = describes each column
Table border = 1 or 2
How to create a list in HTML:
<ol> = ordered list
<L1> = indicates the items on the list
<ul> = unordered list
XML (extensible markup language)
Electronic data interchange allows for documents to be exchanged (they can be
used over the internet) – they group data together and send one file
September 19, 2013
Creating files in XML is done using Textedit
September 24, 2013
Example of a namespace:
In XML Schema, “maxOccurs=any value” means something can occur an
unlimited amount of times, whereas “minOccurs” means it will only occur once
October 1, 2013
David Ticoll suggests that in 10 years, there will be an unlimited amount of
storage for free
There will be a collision between the real world and the virtual world
Canadian economy is becoming electronically and technologically based
Information is output and data is input
Data is collected, recorded, stored and processed
Knowledge is derived from data
Data is processed by summing, ordering, averaging, grouping and comparing
Chapter 1 Notes

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An information system is a group of components that interact to produce
information
All information systems comprise a five-component framework that includes:
computer hardware (the electronic or associated gadgetry that constitute a
computer system), software (programs or applications), data (basic building
blocks of information), procedures (instructions or processes that must be
followed to achieve the objective) and people (interact with the system)
Management information systems (MIS) comprise the development and use of
information systems that help organizations achieve their goals – the definition of
MIS has the following three key elements: development and use (one must
contribute to the development of the information system and learn how to use it
effectively), information systems and goals and objectives (it must be made
sure that the information system is effectively meeting the needs of the entity)
Information technology (IT) comprises the hardware, software and data of an
information system
The sector tied to the use of information systems is the Information and
Communications Technology (ICT) sector (included over 32,000 companies
and generated revenues of over $162B)
Moore’s Law notes that the density of circuits on an integrated chip was doubling
approximately every two years or so (this has been generally accurate over the
last four decades)
IT is embedded in IS
Chapter 2
A business process is a series of tasks or steps designed to produce a product or
service (also known as a business system) – manufacturing, marketing, selling,
purchasing, delivering, ordering, receiving, storing
A business process consists of activities, resources, facilities and information
Activities transform resources and information of one type into resources and
information of another type (activities may be manual, automated, controlled by
computers, or some combination of both)
Resources are items of value (resources may be people as well, such as a supplier
or purchaser)
Facilities are structures used within the business process - resources may be
stored in facilities
Information is used to determine how to transform the inputs they receive into
the outputs they produce
Object Management Group (OMG), a software industry standards organization,
created the Business Process Modeling Notation (BPMN) (a standard set of
terms and graphical notations for documenting business processes)
Information is derived from data, which represents recorded facts or figures
(information is data presented in a meaningful context)
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