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The first prohibited degree of consanguinity was a parent-child relationship while a second degree would be a sibling relationship. A third degree would be an uncle/aunt with a niece/nephew while fourth degree was between first cousins. [4] Any prospective marriage partner with a blood relationship outside these prohibited degrees was ...
In some countries, the prohibition on sexual relations between persons in an affinity relationship may be expressed in terms of degrees of relationship. The degree of affinity is considered the same as the consanguineal level a couple was joined, so that, for example, the degree of affinity of a husband to his sister-in-law is two, the same as ...
By the early 9th century, the Western Church had increased the number of prohibited degrees of consanguinity from four to seven. The method of calculating relationships was also changed to simply count the number of generations back to a common ancestor. [9] The church also prohibited affinity to the same seven degrees.
Marriage law is the body of legal specifications and requirements and other laws that regulate the initiation, continuation, and validity of marriages, an aspect of family law, that determine the validity of a marriage, and which vary considerably among countries in terms of what can and cannot be legally recognized by the state.
Referential integrity is a property of data stating that all its references are valid. In the context of relational databases , it requires that if a value of one attribute (column) of a relation (table) references a value of another attribute (either in the same or a different relation), then the referenced value must exist.
Database normalization is the process of structuring a relational database accordance with a series of so-called normal forms in order to reduce data redundancy and improve data integrity. It was first proposed by British computer scientist Edgar F. Codd as part of his relational model .
The Children Act 1975 added adoptive parents and children, and former adoptive parents and children to the prohibited list. The list was significantly changed, especially by the Marriage (Prohibited Degrees of Relationship) Act 1986, which removed affinity relationships from the list and made other changes. [9]