WHAT MESSAGES ARE SENT IF THE XML FILE IS WELL-FORMED BUT NOT VALID?

04 Jun WHAT MESSAGES ARE SENT IF THE XML FILE IS WELL-FORMED BUT NOT VALID?

Question

Faculty
of Science

Assignment
2 Term
1, 2014

Introduction

This is an individual
assignment in which you can explore the use of extensible files in web programming,
using PHP and XML.

Details of the weight of
the assignment and due date are given in the course description.

Task
Description

Introduction

A simple database with a single
table contains data concerning rental properties in Australia. The table
contains five fields that store data relating to street address, city,
postcode, number of bedrooms and weekly rent e.g. 4/331 Albert Street,
Ballarat, 3350, 3, 230.00. There are constraints placed on the data that are
described below.

The
assignment tasks are closely associated with the lab work of topics 8 to 10.
Code which is provided in the topic 10 lab work should be a useful guide
throughout this assignment.

The assignment requires a
number of files and a report to be produced. The report should respond to
written tasks that are included below.

Initial task

In a word document, create
a table of about 6 records with no NULLs. The street address may contain a unit
number as in the example given above. Add the table to your report, showing
clearly the names of the table and the fields.

Tasks supported by Topics 7
and 8

Mark up the table of data
using XML tags and save it as an .xml file. Check that the file is well-formed
and report the method used. Make a deliberate error and report the error
message.

Create a corresponding
XMLSchema file (.xsd) that contains the following constraints:

A.
the
street address and city are strings each with a maximum of 30 characters;

B.
the
postcode is a string of exactly 4 digits, the first digit being non-zero;

C.
the
number of bedrooms is an integer between 1 and 5 (inclusive);

D.
the
weekly rent is a positive (non-zero) number less than 1000 expressed with two
decimal places.

Use
the .xsd file to validate your .xml file. Test the validation of the .xml file
by breaking each constraint in turn and report the results. Also deliberately
invalidate the .xml file (but keeping it well-formed) and report the response.

Page
1 of 3

Faculty
of Science

Task supported by Topic 9

Create
an XSLT stylesheet file (.xsl) that supports the display of the data in a table.
The data is to be displayed either in ascending postcode order or in ascending
weekly rent order as requested by the user.

Task supported by Topic 10

Create new DOM documents for
each of your .xml and .xsl files. Use these to generate output to the browser.
Comment on the result.

Research

Access the XML DOM Tutorial
at http://www.w3schools.com/dom/dom_nodes_set.asp. Under the ‘Manipulate Nodes’
heading study the ‘Get Values’ and ‘Change Nodes’ sections. It will be
important to have an understanding of the Dom Node Tree from Topic 10 prior to
this study. Write your own code to show that you can both retrieve the value of
the weekly rent of the first record in your XML file and change its value.

Report contents

1.
Diagram
of the table containing the initial data.

2.
State
how you checked that the XML file is well-formed.

3.
What
messages are sent if it is not well-formed?

4.
State
how you checked that the XML file is valid.

5.
What
messages are sent if the XML file is well-formed but not valid?

6.
What
messages are sent if constraints are not met by the data?

7.
How
is the .xsd file validated?

8.
Comment
on the output provided by your two DOM documents.

9.
Draw
a diagram showing the structure of the DOM tree associated with the .xml file,
using data from any ONE record.

10.
Give
details of any assistance received (apart from teaching staff).

Additional task for ITECH6224 students

On the topic of “What, why and
how of web accessibility” identify four (4), relevant, independent resources.
Use these resources to discuss the topic in about 500 words. Take care to cite
appropriately.

Further
details

Refer
to the Course Description for details of submission to Moodle, late
assignments, extensions, special consideration, plagiarism, student support,
presentation of academic work and adopted reference style.

Submission

All files should be zipped and
uploaded to Moodle by the due date and time.

Page 2 of 3

Faculty
of Science

Assignment
2 Marking
Guide Term
1, 2014

Name ____________________________ ID ______________________ Marker ____________________

Criterion Maximum Obtained
Initial data – requirements
satisfied 1
.xml file 5
accurate 3
well-formed 2
.xsd file 5
validates .xml file 2
constraints implemented accurately 3
.xsl file 4
effective 2
sorting implemented correctly 2
DOM documents 4
generated correctly 2
output accurate 2
Research 8
get value 4
change value 4
Web accessibility (ITECH6224 only) 10
content 6
writing style 2
adherence to academic standards 2
Report contents 10
1 mark per section
Quality of code – layout, choice of
names, etc. 3
Totals 40
ITECH3224
ITECH6224 50
Final mark (correct to 1 decimal
place)