The combination is a digraph or trigraph indicating the nasalized vowel. The Spanish digraph "ch" (the phoneme ) is pronounced in most dialects. In the case of a diphthong or a digraph, the second vowel takes the diacritics. He' which is used as a digraph for aspirated consonants in Urdu script. Dutch uses one additional character beyond the standard alphabet, the digraph IJ. In the tournament digraph, the vertices correspond to the players. The system adopted for digraph transliteration is ICAO Doc 9303. In French and Italian orthographies the sound is represented by the digraph . Ch is a digraph in the Latin script. Sh is a digraph of the Latin alphabet, a combination of S and H. A signed digraph is a directed graph with signed arcs. There is no need for diacritical signs and potential digraph confusion is prevented. Gh is a digraph found in many languages. The Dutch digraph was converted to in Afrikaans, although pronunciation remained . The terms rooted directed graph or rooted digraph also see variation in definitions.