Tracks with one asterisk are previously unreleased, tracks with two asterisks contain previously unreleased material. Basic filter rules can include wildcards represented by asterisks (codice 1). For example, starting lines of text with asterisks could create a bulleted list. Groups of digits may be separated by additional asterisks. Asterisks denote courtesy titles currently used by living heirs. Asterisks indicate superior highly composite numbers. Asterisks denote sitting members who were re-elected. Ambiguous forms in different persons are marked with asterisks. New font families introduced with Windows 10 are marked by asterisks. Titles marked with asterisks have been released on CD and/or DVD. Locations marked with asterisks were built as Carnegie libraries. Plays marked with two asterisks (**) are sometimes referred to as the "problem plays". Those marked with asterisks have active community councils. An ornate separator line might be represented instead by a line of asterisks (or not). Another is three asterisks in a horizontal row.