productive word formation process. Both endocentric and exocentric compounds have been described for a variety of sign languages. Copulative compounds or dvandva, which are composed of two or more nouns from the same semantic category to denote that semantic category, also occur regularly in many sign languages. The sign for parents in Italian Sign Language, for instance, is a combination of the nouns ‘father’ and ‘mother’. The sign for breakfast in American Sign Language follows the same concept. The words eat and morning are signed together to create a new word meaning breakfast. This is an example of a sequential compound; in sign languages, it is also possible to form simultaneous compounds, where one hand represents one lexeme while the other simultaneously represents another lexeme. An example is the sign for weekend in Sign Language of the Netherlands, which is produced by simultaneously signing a one-handed version of the sign for Saturday and a one-handed version of the sign for Sunday. In American Sign Language there is another process easily compared to compounding. Blending is the blending of two morphemes to create a new word called a portmanteau. This is different from compounding in that it breaks the strict linear order of compounding. Recent trends in orthography Although there is no universally agreed-upon guideline regarding the use of compound words in the English language, in recent decades written English has displayed a noticeable trend towards increased use of compounds. Recently, many words have been made by taking syllables of words and compounding them, such as pixel (picture element) and bit (binary digit). This is called a syllabic abbreviation. In Dutch and the Scandinavian languages there is an unofficial trend toward splitting compound words, known in Norwegian as særskriving, in Swedish as särskrivning (literally "separate writing"), and in Dutch as Engelse ziekte (the "English disease"). Because the Dutch language and the Scandinavian languages rely heavily on the distinction between the compound word and the sequence of the separate words it consists of, this has serious implications. For example, the Danish adjective røykfritt (literally "smokefree", meaning no smoking allowed) if separated into its composite parts, would mean røyk fritt ("smoke freely"). In Dutch, compounds written with spaces may also be confused, but can also be interpreted as a sequence of a noun and a genitive (which is unmarked in Dutch) in formal abbreviated writing. This may lead to, for example, commissie vergadering