B
- Baseline
- Baseline (in WCAG 2.0) is a set of technologies
that a user agent (browser, media player, screen
reader etc.) is assumed to support and have enabled.
It may be set by the author or higher authority.
When an author makes a WCAG 2.0 conformance claim,
they must specify the baseline that they are using
to make that claim. The author is claiming that
their content will meet WCAG 2.0 at the stated level
of conformance if a user’s agent can support
those (the baseline) technologies.. It's important
to note that the baseline consists of technologies
that are assumed to be supported by user-agents,
and not specific user agents. The concept of baseline
is based around trust. It is very possible to abuse
baselines by declaring technologies that are not
widely supported and not widely supported by assistive
technology.
- Backward Compatible
- Design that continues to work with earlier versions of
a user agent, language, program, etc.
- Blindness
- Blindness includes a variety of conditions involving
extreme (but not complete) or complete loss of vision.
- Block
Level Element
- Block-level elements typically contain inline elements
and other block-level elements. When rendered visually,
they usually begin on a new line. Examples of block level
elements include paragraphs, headings, divs, and
blockquotes.
- Bobby
- A discontinued website accessibility assessment tool
designed to locate and identify certain accessibility
problems within web pages, so that a web developer could
repair those problems. It analyzed web pages and checked
for those accessibility problems that can be checked for
automatically. It was a good first pass for checking your
web pages for accessibility.
- Box
Model
- In Cascading Style Sheets, the box model refers to the rectangular
boxes that are generated for elements in the document
tree and laid out as specified in the visual formatting
model. Every element generates a box, which is call
the element box. As the word "box" implies, these
are rectangular in shape Each box is made up of
a number of parts. In the normal document flow,
the element boxes of block-level elements cannot
overlap each other (floats and positioning are the
exceptions). In other words, the way a page is laid
out depends on the size of each and every box. Going
down the page, in broad terms, each box begins just
below where the previous one ends.
- Braille
- A system of writing for individuals who have visual
disabilities. The Braille system includes letters, numbers,
and punctuation made up of raised dot patterns.
- Breadcrumbs
- Breadcrumbs are a type of web navigation where current location within
the website is indicated by a list of pages above
the current page in the hierarchy, up to the main
page. It not only shows users where they are currently
located in the site's architecture, but it also
lets them back up levels one at a time. It is a
recursive path.
- Browser
- The software on a computer that allows websites to be
rendered so they can be "read" by users. This maybe a
browser that renders things visually, in a manner confined
to text only, or in any other manner that may be
appropriate, such as voice output.
- Browser
Style Sheet
- This is the default style sheet within a browser. If a
designer declares no style rules, the defaults from the
browser are applied. Most browsers apply style sheets to
all web documents. Although these style sheets vary from
browser to browser, they all have common traits like black
text, blue links, purple visited links etc. These are
referred to as the "default" browser style sheet.
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