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The symbol is widely supposed to have been derived from the pheon in the arms of the Sidney family, through the influence either of Sir Philip Sidney, who served as Joint Master-General of the Ordnance in 1585–6; or that of his great-nephew, Henry Sydney, 1st Earl of Romney, who served as Master-General from 1693 to 1702.
Crow's foot notation, a set of symbols used to show relationships in a relational database management system; Crowfoot wrench; Crow's feet, a name for wrinkles in the outer corner of the eyes resulting from aging
Barker's notation refers to the ERD notation developed by Richard Barker, Ian Palmer, Harry Ellis et al. whilst working at the British consulting firm CACI around 1981. The notation was adopted by Barker when he joined Oracle and is effectively defined in his book Entity Relationship Modelling as part of the CASE Method series of books.
the crow's foot represents "many" or "infinite" These symbols are used in pairs to represent the four types of cardinality that an entity may have in a relationship. The inner component of the notation represents the minimum, and the outer component represents the maximum.
Two related entities shown using Crow's Foot notation. In this example, the three lines next to the song entity indicate that an artist can have many songs. The two vertical lines next to the artist entity indicate songs can only have one performer.
' Crow-big-foot ') [1] [2] was a chief of the Siksika. His father, Istowun-ehʼpata (Packs a Knife), and mother, Axkahp-say-pi (Attacked Towards Home), were Kainai . He was five years old when Istowun-ehʼpata was killed during a raid on the Crow tribe , and, a year later, his mother remarried to Akay-nehka-simi (Many Names) of the Siksika ...
Yatagarasu as a crow-god is a symbol specifically of guidance. This great crow was sent from heaven by Takamimusubi as a guide for legendary Emperor Jimmu on his initial journey from the region which would become Kumano to what would become Yamato ( Yoshino and then Kashihara ).
A caltrop (also known as caltrap, galtrop, cheval trap, galthrap, [1] galtrap, calthrop, jackrock or crow's foot [2] [3]) is an area denial weapon made up of usually four, but possibly more, sharp nails or spines arranged in such a manner that one of them always points upward from a stable base (for example, a tetrahedron).