Returns the image type name (empty string if invalid). Returns the time instant (a dateTime value) at which a given time period begins. The period may be expressed as a year, month, or date according to the Gregorian calendar. Adds a given attribute to the nodes of a document, retrieved by the xpath expression. Extracts the path portion of a filepath (minus the filename). Returns the URL for the resource at a given resource path. String to encode Returns the URL encoded form of a string. Determines whether TEAM Engine is running as a web application. Returns 'true' or 'false'.