Datenschlag is a German-language

German language

German is a West Germanic language, related to and classified alongside English and Dutch. With an estimated 90 – 98 million native speakers, German is one of the world's major languages and is the most widely-spoken first language in the European Union....

 BDSM

BDSM

BDSM is an erotic preference and a form of sexual expression involving the consensual use of restraint, intense sensory stimulation, and fantasy power role-play. The compound acronym BDSM is derived from the terms bondage and discipline , dominance and submission , and sadism and masochism...

 support and information site based on a private mailing list

Mailing list

A mailing list is a collection of names and addresses used by an individual or an organization to send material to multiple recipients. The term is often extended to include the people subscribed to such a list, so the group of subscribers is referred to as "the mailing list", or simply "the...

 and a public website

Website

A website, also written as Web site, web site, or simply site, is a collection of related web pages containing images, videos or other digital assets. A website is hosted on at least one web server, accessible via a network such as the Internet or a private local area network through an Internet...

. Datenschlag was founded in 1996 to collect and provide as much information about sadomasochism as possible — as an offspring of that effort, it has compiled the world's largest bibliography, one of the most extensive history and a dictionary of German BDSM terms.

Datenschlag is furthermore devoted to countering the discriminatory image of sadomasochism in parts of science and the media and to establishing an international network of BDSM information sites.

"Daten" means data

Data

The term data refers to qualitative or quantitative attributes of a variable or set of variables. Data are typically the results of measurements and can be the basis of graphs, images, or observations of a set of variables. Data are often viewed as the lowest level of abstraction from which...

, while "schlag" means "to hit" as in "to spank

Spanking

Spanking refers to the act of striking the buttocks of another person to cause temporary pain without producing physical injury. It generally involves one person striking the buttocks of another person with an open hand. When an open hand is used, spanking is referred to in some countries as...

", but also "to look up (a book)".