Publishers of technology books, eBooks, and videos for creative people

Home > Articles > Web Design & Development > CSS

Integrated Web Design: Seven Deadly Markup Sins

HTML or XHTML? If you're in Web design and development, you're using something to mark up your pages. And, if you've been in the industry awhile, no doubt you've learned some standards-based techniques. But despite all our growth and knowledge, some nagging problems remain. Molly Holzschlag helps you hone in on the most common markup mistakes and shows you how to repair them with ease.
Like this article? We recommend

Like this article? We recommend

Despite all the attention on Web standards in the past few years, there are ongoing problems with document conformance when it comes to HTML and XHTML.

I was recently involved as a judge at the HOW design contest, and have served as a judge for the Webby Awards—which recently announced their winners for 2004. Although both contests place emphasis on quality design and content, there's little attention paid to standards. I'm sure that readers can just picture me viewing source and validating sites because hey, that's what I do. Alas, the results were very distressing. Out of several hundred sites—many of them extremely prominent, well-known web sites—only a mere handful conformed to HTML or XHTML specifications.

What's encouraging about many of the sites is that some attempts by designers and developers to adhere to standards are obvious. What's discouraging about the sites are the kinds of errors showing up. Many of these errors are incredibly easy to repair! Of course, some sites are relying on problem Content Management Systems and others are being served markup via their ad server provider. In those cases, errors are introduced that are beyond the developer's immediate control.

No matter the cause, all developers would do well to take a look at the top seven mistakes I found within these sites. By looking at what we're doing wrong and how to do it right, we can quickly address poor markup practices and create more compliant documents.

1. Document Encoding Problems

Although document encoding does not influence a document's validity per se, it does influence the capability of that document to be validated and properly displayed. Unfortunately, it seems that many designers and developers are unaware of the need for encoding.

Document encoding describes the character set that is being used. Documents in English, for example, have long been identified with the character encoding iso-8859-1, which is the Latin character set. In recent years, we've been able to tap into UTF-8, a more universal character encoding standard.

In an ideal world, all encoding is done on the server. In this scenario, the server administrator sets the proper encoding via the HTTP headers. This can be done with any kind of web server—check with your systems administrator and find out whether encoding is set. If so, you're good to go and do not need to add any additional information about encoding.

However, if your server does not have encoding set, there are two alternative means of adding encoding information. You can add the encoding via a meta element, as follows:

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

If you're using XHTML and want to include the XML declaration, you can include your encoding there, as well:

<?xml version="1.0" encoding="UTF-8" ?>

Of course, there are problems related to using this declaration (also referred to as the XML prolog). If IE 6.0 encounters it, it won't flip the DOCTYPE switch. (If you're not familiar with DOCTYPE switching, read on.) Other problems with the prolog include rendering issues on many older browsers that simply do not recognize the XML syntax or attempt to render the document as an XML tree rather than the document itself.

Another problem that's showing up a lot now that the W3C has upgraded its markup validator is document encoding mismatches. This problem comes from instances where the encoding is, as recommended, set on the server, but the document author includes a conflicting character set.

So, to effectively manage these problems, follow these steps:

  1. Check with your system administrator and ascertain which encoding type is set for your server. If it's set properly, do not add a meta element within your documents. Be careful because many tools automatically add the encoding for you. In those cases, strip out the meta element to avoid conflict and unnecessary markup.

  2. If document encoding isn't set on the server, you may have to resort to using the meta element solution. It's not ideal, but it will work and will allow you to validate your document without causing warnings to occur.

NOTE

For more information on this issue, please see the article, "WaSP Asks the W3C: Specifying Character Encoding."

Peachpit Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from Peachpit and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Peachpit products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites; develop new products and services; conduct educational research; and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email ask@peachpit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by Adobe Press. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.peachpit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020