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Furthermore , MetaPost takes a very simple-minded approach to font encoding : since TeX font encodings regularly confuse sophisticated minds , this can prove troublesome . Quite a few glyphs available in Knuth 's text encodings and in the Cork encoding are not available in the Adobe fonts . Although XML parsers are required only to read UTF-8 and UCS-2 encodings , the Microsoft 's XML parsers handle many more encodings , such as shift-jis , euc-jp , and big5 . Problems may also arise from the oddity of typical TeX font encodings ( notably those of the maths fonts ) , which Acrobat doesn ’ t know how to map to its standard Unicode representation . Problems may also arise from the oddity of typical TeX font encodings ( notably those of the maths fonts ) , which Acrobat does n't know how to map to its standard Unicode representation . I have occasionally wondered about doing this : I envisage that we would co-opt the top half of the unsigned long space ( never used by any flavour of Unicode / UCS ever ) to provide more than enough fake character encodings for the purpose . The use of a hexadecimal representation of character references is preferred over decimal representations , since Unicode character encodings are defined using hex numbers . The <characters> element provides optional information about characters that are in common use in the locale , and information that can be helpful in picking resources or data appropriate for the locale , such as when choosing among character encodings that are typically used to transmit data in the language of the locale . This failure to conform to the GeneralString specifications results in interoperability issues when conflicting character encodings are utilized by the Kerberos clients , services , and KDC . However , there are wrinkles , the most important of which is the matter of font encodings . CM-super is an auto-traced set which encompasses all of the T1 and TS1 encodings as well as the T2 * series ( the family of encodings that cover languages based on Cyrillic alphabets ) . The use of a third character encoding to serve as an intermediate step in the conversion between two other character encodings . Unfortunately , many fonts that have appeared recently simply don ’ t come in versions using Knuth ’ s eccentric font encodings — but those encodings are built into Plain TeX , so that some macros of Plain TeX need to be changed to use the fonts .