A named capturing group is a particular kind of capturing group that allows to give a name to the group. The group's matching result can later be identified by this name instead of by its index in the pattern.

The data-* SVG attributes are called custom data attributes. They let SVG markup and its resulting DOM share information that standard attributes can't, usually for scripting purposes. Their custom data are available via the SVGElement interface of the element the attributes belong to, with the HTMLElement.dataset property.

Default function parameters allow named parameters to be initialized with default values if no value or undefined is passed.

The color-profile attribute is used to define which color profile a raster image included through the <image> element should use.

The SVG script element allows to add scripts to an SVG document.

The remainder assignment (%=) operator performs remainder on the two operands and assigns the result to the left operand.

The for statement creates a loop that consists of three optional expressions, enclosed in parentheses and separated by semicolons, followed by a statement (usually a block statement) to be executed in the loop.

The color-interpolation-filters attribute specifies the color space for imaging operations performed via filter effects.

The SVG <set> element provides a simple means of just setting the value of an attribute for a specified duration.

The glyph-orientation-horizontal attribute affects the amount that the current text position advances as each glyph is rendered.