Web Developers Glossary
Basically, this is the ability of a website to be used by people with disabilities, including visually impaired visitors using screen readers, hearing impaired visitors using no sound, color blind people, or those with other disabilities. A website with low accessibility is basically going to be impossible for those with disabilities to use. Accessibility is particularly important for sites providing information to those with disabilities (healthcare sites, government sites, etc.), though it is an important aspect to consider when designing any site.
The back end of a website is the part hidden from view of regular website visitors. The back end generally includes the information structure, applications, and the CMS controlling content on the site.
Backlinks are links from other sites back to your own. They’re sometimes also referred to as “trackbacks” (especially on blogs). Backlinks have a huge impact on your sites search rankings. Lots of backlinks from high-ranking sites can greatly improve your search engine results, especially if those links use keywords in their anchor text.
A “bad neighborhood” refers to the server where your site is hosted. A site hosted on a server that hosts other sites that spam or use black-hat SEO practices can end up penalized by search engines solely because of their proximity to those sites. In other words, be very careful about which web host you choose, what their terms of service are, and how strictly they enforce those terms if you want to avoid being penalized because of what your neighbors are doing. Linking to sites in bad neighborhoods can also have a negative effect on your search rankings.
Bandwidth can refer to two different things: the rate at which data can be transferred or the total amount of data allowed to be transferred from a web host during a given month (or other hosting service term) before overage charges are applied. It is generally referred to in term of bits-per-second (bps), kilobits per second (kbs), or other metric measurements. Lower bandwidth internet connections (such as dial-up) mean data loads slower than with high bandwidth connections (like cable or fiber).
BELOW THE FOLD
This term is a carry-over from newspaper publishing days. In newspaper terms, “below the fold” means content was on the bottom half of the page (below the physical fold in the paper). In web design terms, “below the fold” refers to the content that is generally going to be below the point first viewable to the average website visitor in their browser (in other words, viewers would have to scroll down to see the content).
Browser refers to the program a website visitor is using to view the web site. Examples include Safari, Firefox, Google Chrome, Opera, and Internet Explorer.
Cached files are those that are saved or copied (downloaded) by a web browser so that the next time that user visits the site, the page loads faster.
CASCADING STYLE SHEETS
Also referred to simply as CSS, Cascading Style Sheets are used to define the look and feel of a web site outside of the actual HTML file(s) of the site. In recent years, CSS has replaced tables and other HTML-based methods for formatting and laying out websites. The benefits to using CSS are many, but some of the most important are the simplification of a site’s HTML files (which can actually increase search engine rankings) and the ability to completely change the style of a site by changing just one file, without having to make changes to content.
Client-side refers to scripts that are run in a viewer’s browser, instead of on a web server (as in server-side scripts). Client-side scripts are generally faster to interact with, though they can take longer to load initially.
CONTENT MANAGEMENT SYSTEM
Also known as a CMS, the Content Management System is a backend tool for managing a site’s content that separates said content from the design and functionality of the site. Using a CMS generally makes it easier to change the design or function of a site independent of the site’s content. It also (usually) makes it easier for content to be added to the site for people who aren’t designers.
In web design terms, a comment is a bit of information contained in a site’s HTML or XHTML files that is ignored by the browser. Comments are used to identify different parts of the file and as reference notes. Good commenting makes it much easier for a designer (whether the original designer or someone else) to make changes to the site, as it keeps it clear which parts of the code perform which functions. There are different comment formats for different programming and markup languages.
See Cascading Style Sheets.
A CSS framework is a collection of CSS files used as the starting point to make XHTML and CSS web sites quickly and painlessly. They usually contain CSS styles for typography and layout.
Deprecated code is code that is no longer included in the language specifications. Generally this happens because it is replaced with more accessible or efficient alternatives.
In GIF and certain other image formats, there is a limited color palette used for each image. Because of this, not all colors in an image are presented. Dither is used to approximate these colors by combining pixels of different colors side by side.
Stands for Domain Name Service (alternately Domain Name System or Domain Name Server). Basically, it’s the thing that converts IP addresses into domain names. DNS servers are provided with the IP address of your web server when you assign your domain name to those servers. In turn, when someone types your domain name into their web browser, those DNS servers translate the domain name to the IP address and point the browser to the correct web server.
The doctype declaration specifies which version of HTML is used in a document. It has a direct effect on whether your HTML will validate.
Stands for Document Object Model. It’s a language-indpendent, cross-platform convention for representing objects in XML, XHTML, and HTML documents. Rules for interacting with and programming the DOM are specified in the DOM API.
The domain is the name by which a website is identified. The domain is associated with an IP address. Domains can be purchased with any combination of letters, hyphens (-), and numbers (though it can’t start with a hyphen). Depending on the extension (.com, .net, .org, etc.), a domain can be anywhere up to 26 to 63 characters long.
Short for electronic commerce. It’s the buying and selling of goods online, through websites. Products sold through e-commerce can be physical products that require shipping, or digital products delivered electronically.
An elastic layout is one that uses percentages and ems for widths paired with a max-width style to allow the site layout to stretch when font sizes are changed. It’s ability to flex to accommodate the browser width and reader’s font preferences are where it gets its name.
In XML, an element is the central building block of any document. Individual elements can contain text, other elements, or both.
Em is a unit of measurement for sizing fonts and other elements within a web page relative to the item’s parent element. A 1em font is equal to the point size for the font already defined in the parent element (2em would be twice the current size; .5em would be half the current size).
An embedded style is a CSS style written into the head of an XHTML document. It only effects the elements on that page, instead of site-wide as a separate CSS file does. Style in an embedded style sheet will override styles from the linked CSS file.
Favicons are tiny (generally 16x16 pixels, though some are 32x32 pixels), customizable icons displayed in the web address bar in most browsers next to the web address. They’re either 8-bit or 24-bit in color depth and are saved in either .ico, .gif or .png file formats.
FIXED WIDTH LAYOUT
A fixed width layout has a set width (generally defined in pixels) set by the designer. The width stays the same regardless of screen resolution, monitor size, or browser window size. It allows for minute adjustments to be made to a design that will stay consistent across browsers. Designers have more control over exactly how a site will appear across platforms with this type of layout.
See Liquid Layout
The focal point of a web site is the spot on a web page that they eye is naturally drawn to. This could be an image, a banner, text, Flash content, or just about anything else. You want to make sure that whatever is acting as your focal point is the most important part of your site.
The fold is a term carried over from newspaper design and pagination (where the fold referred to the physical fold in the paper). The fold in a website is the point on the webpage that rests at the bottom of someone’s browser (in other words, to see anything below the fold, they would have to scroll down). There are varying opinions on how important the fold is in web design.
Font family is a group designation for defining the typefaces used in CSS documents. The font family tag generally lists multiple fonts to be used, and usually ends with the generic font category (such as “serif” or “sans-serif’).
In CSS, the font style refers solely to whether a font is italic or not.
The font weight refers to how thick or thin (bold or light) a font looks.
The front-end is basically the opposite of the back-end. It’s all the components of a website that a visitor to the site can see (pages, images, content, etc.) Specifically, it’s the interface that visitors use to access the site’s content. It’s also sometimes referred to as the User Interface.
Also referred to a “hex” numbers, they are a base-16 numbering system used to define colors online. Hex numbers include the numerals 0-9 and letters A-F. Hexadecimal numbers are written in three sets of hex pairs. Because screen colors are RGB (Red, Green, Blue), the first pair defines the red hue, the second pair defines the green hue, and the third pair defines the blue.
Contrary to popular belief, a hit does not represent a single visitor to a website. A hit is actually a request for a single file from your web server. This means one page can actually generate multiple hits, as each page generally has more than one file (an html or other base file, a css file, multiple images, etc.) and each one is requested from the server whenever the page is loaded. Some marketing people like to quote hits to unknowing consumers as the number makes their site sound like it’s getting a whole lot more traffic than it actually is.
Stands for Hypertext Markup Language. It’s the primary language used to write web pages. HTML is primarily intended as a way to provide content on websites (with CSS handling the layout and stylistic options), though it can also be used to determine how that content is displayed.
Also referred to as an HTML element, an HTML tag is the bit of code that describes how that particular piece of the web page it’s on is formatted. Typical tags specify things like headings, paragraphs, links, and a variety of other items.
Stands for HyperText Transfer Protocol. HTTP is a set of rules for transferring hypertext requests between a web browser and a web server.
Similar to HTTP, HTTPS stands for HyperText Transfer Protocol over SSL (Secure Socket Layer) or, alternately, HyperText Transfer Protocol Secure. Like HTTP, it’s a set of rules for transferring hypertext requests between browsers and servers, but this time it’s done over a secure, encrypted connection.
A hyperlink is a link from one web page to another, either on the same site or another one. Generally these are text or images, and are highlighted in some way (text is often underlined or put in a different color or font weight). The inclusion of hyperlinks are the “hyper” part of “hypertext.”
Hypertext is any computer-based text that includes hyperlinks. Hypertext can also include presentation devices like tables or images, in addition to plain text and links.
An image map is used in XHTML to allow different parts of an image to become different clickable elements (and can also allow some portions of the image to have no clickable element).
A landing page is the page where a visitor first enters a website. Oftentimes, a special landing page is created to elicit a specific action from the new visitor (usually in connection with an advertising or marketing campaign).
A liquid layout is one that is based on percentages of the browser window’s size. The layout of the site will change with the width of the browser, even if the visitor changes their browser size while viewing the page. Liquid layouts take full advantage of a person’s browser width, optimizing the amount of content you can fit onscreen at one time.
This refers to the coding applied to a text document to change it into an HTML, XML, or other Markup Language document.
Meta data is the data contained in the header that offers information about the web page that a visitor is currently on. The information contained in the meta data isn’t viewable on the web page (except in the source code). Meta data is contained within meta tags.
Navigation refers to the system that allows visitors to a website to move around that site. Navigation is most often thought of in terms of menus, but links within pages, breadcrumbs, related links, pagination, and any other links that allow a visitor to move from one page to another are included in navigation.
Nesting refers to putting one HTML element within another element. When this is done, the elements have to be closed in the reverse order from how they were opened.
A non-breaking space (also referred to as ) is a white-space character that isn’t condensed by HTML. It’s primary function is to hold open table cells or add spacing between words (or a the beginning of paragraphs if an indent is desired).
Open source refers to the source code of a computer program being made available to the general public. Open source software includes both web-based and desktop applications. Open source programs are generally free or very low cost and are developed by teams of people, sometimes comprised mostly of volunteers.
A pageview is a request for an entire web page document from a server by a visitor’s browser. In other words, for each page view your site had, someone (or a search engine spider) looked at that page.
Short for “permanent link.” Generally used only on blogs, a permalink is a link that is the permanent web address of a given blog post. Since most blogs have constantly-changing content, the permalink offers a way for readers to bookmark or link to specific posts even after those posts have moved off the home page or primary category page.
A plug-in is a bit of third party code that extends the capabilities of a website. It’s most often used in conjunction with a CMS or blogging platform. Plug-ins are a way to extend the functionality of a website without having to redo the core coding of the site. Plugins can also refer to bits of third-party software installed within a computer program to increase its functionality.
Progressive enhancement is a strategy for web design that uses web technologies in a layered fashion that allows everyone to access the basic content and functionality of a web page, using any browser or Internet connection, while also providing those with better bandwidth or more advanced browser software an enhanced version of the page.
Property is a CSS term and is roughly equivalent to an HTML tag. Properties are what define how a style should appear on a given web page.
A pseudo-element is an element used to add a special effect to certain selectors.
REALLY SIMPLE SYNDICATION
Also referred to as RSS. RSS is a standardized XML format that allows content to be syndicated from one site to another. It’s most commonly used on blogs. RSS also allows visitors to subscribe to a blog or other site and receive updates via a feed reader.
Refers to the physical number of pixels displayed on a screen (such as 1280x1024). Unlike in print, display resolution does not refer to the number of pixels or dots per inch on a computer screen, as this can be changed by changing the resolution of the screen (which, of course, does not change the physical size of the screen). The resolution of an image, however, is often referred to in terms of pixels per inch, though this has very little effect on how the image is displayed on screen.
A tag is a set of markup characters that are used around an element to indicate its start and end. Tags can also include HTML or other code to specify how that element should look or behave on the page. See also HTML Tag.
A template is a file used to create a consistent design across a website. Templates are often used in conjunction with a CMS and contain both structural information about how a site should be set up, but also stylistic information about how the site should look.
Stands for Uniform Resource Locator. A site’s URL is its address, the item that specifies where on the Internet it can the found.
A web page is a single document, generally written in HTML/XHTML, meant to be viewed in a web browser. In many cases, web pages also include other coding and programming (such as PHP, Ruby on Rails, or ASP). Web sites are generally built from multiple interlinked web pages.
Standards are specifications recommended by the World Wide Web Consortium for standardizing website design. The main purpose of web standards is to make it easier for both designers and those who create web browsers to make sites that will appear consistent across platforms.
Stands for Extensible Hypertext Markup Language. Basically, XHTML is HTML 4.0 that has been rewritten to comply with XML rules.