As used for Egyptology, transliteration of Ancient Egyptian is the process of converting (or mapping) texts written as Egyptian language symbols to alphabetic symbols representing uniliteral hieroglyphs or their hieratic and demotic counterparts. This process facilitates the publication of texts where the inclusion of photographs or drawings of an actual Egyptian document is impractical. Transliteration is not the same as transcription. Transliteration is the representation of written symbols in a consistent way in a different writing system, while transcription indicates the pronunciation of a text. For the case of Ancient Egyptian, precise details of the phonology are not known completely. Transcription systems for Ancient Egyptian do exist, but they rely on linguistic reconstruction (depending on evidence from the Coptic language and other details) and are thus theoretical in nature. Egyptologists rely on transliteration in scientific publications. Standards Important as transliteration is for Egyptology, there is no one standard scheme in use for hieroglyphic and hieratic texts. However, there are a few closely related systems that can be regarded as conventional. Many non-German-speaking Egyptologists use the system described in Gardiner 1954, whereas many German-speaking scholars opt for that used in the Wörterbuch der ägyptischen Sprache (Erman and Grapow 1926–1953), the standard dictionary of the ancient Egyptian language. However, there is a growing trend, even among English-speaking scholars, to adopt a modified version of the method used in the Wörterbuch (e.g., Allen 2000). Although these conventional methods of transliteration have been used since the second half of the nineteenth century to the present time, there have been some attempts to adopt a modified system that seeks to use the International Phonetic Alphabet to a certain extent. The most successful of these is that developed by Wolfgang Schenkel (1990), and it is being used fairly widely in Germany and other German-speaking countries. More recent is a proposal by Thomas Schneider (2003) that is even closer to the IPA, but its usage is not presently common. The major criticism of both of these systems is that they give an impression of being scientifically accurate with regard to the pronunciation of Egyptian, though the actual accuracy is debatable. Moreover, the systems represent only the theoretical pronunciation of Middle Egyptian and not the older and later phases of the language, which are themselves to be transliterated with the same system. Table of transliteration schemes Although the system of Egyptian hieroglyphs is very complicated, there are only