EXTENDED BACKUS-NAUR FORM
\ɛkstˈɛndɪd bˈakəsnˈɔː fˈɔːm], \ɛkstˈɛndɪd bˈakəsnˈɔː fˈɔːm], \ɛ_k_s_t_ˈɛ_n_d_ɪ_d b_ˈa_k_ə_s_n_ˈɔː f_ˈɔː_m]\
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Any variation on the basic Backus-Naur Form (BNF)meta-syntax notation with (some of) the following additionalconstructs: square brackets "[..]" surrounding optionalitems, suffix "*" for Kleene closure (a sequence of zero ormore of an item), suffix "+" for one or more of an item,curly brackets enclosing a list of alternatives, andsuper/subscripts indicating between n and m occurrences.All these constructs can be expressed in plain BNF using extraproductions and have been added for readability andsuccinctness.
By Denis Howe
Word of the day
Platidiam
- An inorganic water-soluble platinum complex. After undergoing hydrolysis, it reacts DNA produce both intra interstrand crosslinks. These crosslinks appear to impair replication and transcription of DNA. The cytotoxicity cisplatin correlates with cellular arrest in G2 phase cell cycle.