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Placeholder

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	A placeholder is a general term, sign or symbol, which is used in place of a specific unknown or irrelevant term or value. Placeholder may also refer to: In language: Placeholder name Placeholder name Placeholder names are words that can refer to objects or people whose names are either irrelevant or unknown in the context in which it is being discussed.... , words that can refer to objects or people, whose names are unknown or irrelevant Filler text Filler text Filler text is text that shares some characteristics of a real written language, but is random or otherwise generated. It may be used to display a sample of fonts, generate text for testing, or to spoof an e-mail spam filter.... , shares some characteristics of a real written text, but is random or otherwise generated Lorem ipsum Lorem ipsum In publishing and graphic design, lorem ipsum is common placeholder text used to demonstrate the graphics elements of a document or visual presentation, such as font, typography, and layout.... , text used to demonstrate the font, typography or layout in a document In mathematics and computer science: Free variables and bound variables Free variables and bound variables In mathematics, and in other disciplines involving formal languages, including mathematical logic and computer science, a free variable is a notation that specifies places in an expression where First-order_logic#Substitution may take place.... , symbols that will later be replaced by some literal string Metasyntactic variable Metasyntactic variable The phrase metasyntactic variable is a neologism that is used in some programmer communities to describe a placeholder name or an Aliasing term commonly used to denote the subject matter under discussion or an arbitrary member of a class of things under discussion.... , alias term used to denote the subject matter under discussion