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Duplicate content is a term used in the field of search engine optimization to describe content that appears on more than one web page. The duplicate content can be substantial parts of the content within or across domains and can be either exactly duplicate or closely similar. [ 1 ]
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues in search engine optimization by specifying the "canonical" or "preferred" version of a web page. It is described in RFC 6596, which went live in April 2012. [1] [2]
In computer programming, duplicate code is a sequence of source code that occurs more than once, either within a program or across different programs owned or maintained by the same entity. Duplicate code is generally considered undesirable for a number of reasons. [ 1 ]
This category contains articles with sections that contain duplications of content from other articles. This does not mean that all the articles listed are exactly the same as another article. The template {{ Duplication }} will place articles in this category.
Article spinning is a writing technique used to deceitfully create what appears to be new content from pre-existing works. It is commonly used in on the internet by websites as a method of search engine optimization (SEO) and by students as a form of plagiarism.
A related technique is single-instance (data) storage, which replaces multiple copies of content at the whole-file level with a single shared copy. While possible to combine this with other forms of data compression and deduplication, it is distinct from newer approaches to data deduplication (which can operate at the segment or sub-block level).
"Don't repeat yourself" (DRY), also known as "duplication is evil", is a principle of software development aimed at reducing repetition of information which is likely to change, replacing it with abstractions that are less likely to change, or using data normalization which avoids redundancy in the first place.
The term deduplication refers generally to eliminating duplicate or redundant information. Data deduplication, in computer storage, refers to the elimination of redundant data; Record linkage, in databases, refers to the task of finding entries that refer to the same entity in two or more files