Breadcrumb

Definition
Breadcrumbs (or breadcrumb trail or cookie crumb) is a navigation aid used in user interfaces. It gives users a way to keep track of their locations within programs or documents. The term comes from the trail of breadcrumbs left by Hansel and Gretel in the popular fairytale.

Websites
Breadcrumbs typically appear horizontally across the top of a web page, usually below title bars or headers. They provide links back to each previous page the user navigated through to get to the current page or &mdash; in hierarchical site structures &mdash; the parent pages of the current one.

Breadcrumbs provide a trail for the user to follow back to the starting or entry point. A greater-than sign (>) often serves as hierarchy separator, although designers may use other glyphs (such as &raquo;), as well as various graphical treatments.

Typical breadcrumbs look like this:

Home page > Section page > Subsection page

Types of breadcrumbs
There are three types of web breadcrumbs:


 * Path: path breadcrumbs are dynamic and show the path that the user has taken to arrive at a page.
 * Location: location breadcrumbs are static and show where the page is located in the website hierarchy.
 * Attribute: attribute breadcrumbs give information that categorizes the current page.

Usability
Some commentators criticize path-style breadcrumbs because they duplicate functionality that properly subsists in the browser; namely, the 'Back' button and browsing history.

Location breadcrumbs are not necessarily appropriate for sites whose content is so rich that single categories do not fully describe a particular piece of content. This is a common situation in sites employing a search-base navigation paradigm (for example, Amazon.com).

Global positioning system (GPS)
Advanced GPS tools may keep track of the motion of a GPS device bearer by recording the positions of the traveler at specified time moments and presenting them at a GPS display as a "breadcrumb trail" of position markers.