Final7008
Charlene Moore
7008
Spring 2013
Final
1.a.1.
A relational database has information arranged in tables containing a primary key, or piece of information that will relate the information in the table to other tables or models. The primary key of a different table is the foreign key to a table. So that information can be pulled up from any of the related tables. This is a structured system.
Information retrieval systems rerieves from a collection of various information sources. These may or may not have a direct relation to each other. Queries are used.
2. Julie should use an information retrieval system, because the information sources from memos, various emails, and reports may have no direct relationship to each other. So pulling up information may rely on keyword queries. However, placing items into categories such as engineering, HR, etc will help reduce irrelevant results.
1.b.1
Web indexing is basically indexing how sites are used on the web. Indexing can be done in a number of ways. Through content, to see what subjects can be retrieved. Through URL indexing, to see how many sites and pages exist. Through indexing user behavior.
2. Included in the 60 billion pages are any pages that can be read by humans and have keywords or links that make them retrievable. What is not included is coded pages that computers read for instructions, email, files on private servers and computers, and possibly pages that are corrupted or too old for a person to pull up and read.
3. Some pages are not indexed because they are not read by humans or they have disabled URL and can’t be retrieved.
1c.1
<?xml version=”1.0” encoding=””>
<bookstore>
<book category=”SCIENCE & TECHNOLOGY”>
<title lang=”en”>Discovering Computers Complete</title>
<author>Gary B. Shelley</author>
<coauthor>Misty E. Vermaat</coauthor>
<publisher>Course Technology</publisher>
<isbn>ISBN-13:978-1-1115-3032-7</isbn>
</book>
</bookstore>
1.e.1
External CSS is best to use when the style is required on several pages. So that any changes to the page styles can be done in one file. The CSS file, and all pages will need to have an <href> link to the stylesheet such that
. <head>
<link rel="stylesheet" type="text/css" href="mystyle.css">
</head>
Internal CSS is used when only one or possibly two pages will have the same style. This is done in the
<head> of the main html document, such that
<head>
<style>
H2 {color:sienna;}
</style>
</head>
2. Best to use external CSS when several pages require the same styles.
Best to use nternal CSS when only one or two pages will have the same style.
3. To use CSS in XML, must format the XML tags with the CSS.
1.h.1
Precision of Rank A, first hit no data precision is 0, precision goes up because next three hits bring up data. (0/0+ ½+ 2/3+ ¾+ 3/5+ ½+ 4/7+ ½+ 4/9+½) / 10. Average is ½ precision
Rank B
(1/1+ ½+ 1/3+ ½+ 3/5+ ½+ 4/7+ ½+ 5/9+ ½) / 10, Average is also about ½ precision.
With decimals, Rank B is marginally better with .555 precision.
Rank A is .502.
1.i.1
1. Probably not able to google the result page, unless the specific URL is known.
2. Google does what is called crawling the web, this brings up most current used web sources. The page
Julie made would only be used by Julie, until it is used significantly by other users, google will not really have an interest in having it come up on its browser. So, it is best to know the exact URL to pull up the page.
2.
URL http://classes.slis.lsu.edu/wu/7008/sp13/cmoore/New.html
