DTD stands for "Document Type Definition" as specified in the XML 1.x Recommendations of the W3C. DTDs define formal grammars for XML documents: which tags you can use and where you can use them. Validating XML processors apply this grammar to XML documents to determine whether they conform to these grammars, in which case the document is "valid".

An SKSpriteNode is a node that draws a textured image, a colored square, or a textured image blended with a color.

Use this tag for questions specific to the 2017 version of Microsoft's SQL Server.

The multiplayer tag typically refers to a feature of games software where more than one user can interact with the same instance of the software.

A relation on sets S1, S2, ..., SN is any subset of S1 x S2 x ... x SN, where 'x' denotes the Cartesian product. In other words, a relation over N sets is any set of ordered N-tuples over the N sets.

Synonym of selector or chooser.

is for questions dealing with the type of the variable or value returned by a function.

Visio is a diagramming tool included as part of the Microsoft Office suite, though it is usually acquired separately. It is used to create documents such as flowcharts, organizational charts, network topologies, and software architecture diagrams.

Database normalization is the process of organizing the fields and tables of a relational database to minimize redundancy and dependency. It removes insertion, deletion and update anomalies. Normalization involves decomposing a table into less redundant, smaller tables without losing information.

An HTTP Proxy is a server that receives requests from your web browser and then makes the request to the Internet on your behalf. It then returns the results to your browser.

Hibernate Search automatically extracts data from Hibernate ORM entities to push it to local Apache Lucene indexes or remote Elasticsearch indexes.