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The following character entities may be used within IESR descriptions to represent non-ASCII characters:
| á | á | small a, acute accent |
| Á | Á | capital A, acute accent |
| â | â | small a, circumflex accent |
| Â | Â | capital A, circumflex accent |
| à | à | small a, grave accent |
| À | À | capital A, grave accent |
| å | å | small a, ring |
| Å | Å | capital A, ring |
| ã | ã | small a, tilde |
| Ã | Ã | capital A, tilde |
| ä | ä | small a, dieresis or umlaut mark |
| Ä | Ä | capital A, dieresis or umlaut mark |
| æ | æ | small ae diphthong (ligature) |
| Æ | Æ | capital AE diphthong (ligature) |
| ç | ç | small c, cedilla |
| Ç | Ç | capital C, cedilla |
| ð | ð | small eth, Icelandic |
| Ð | Ð | capital Eth, Icelandic |
| é | é | small e, acute accent |
| É | É | capital E, acute accent |
| ê | ê | small e, circumflex accent |
| Ê | Ê | capital E, circumflex accent |
| è | è | small e, grave accent |
| È | È | capital E, grave accent |
| ë | ë | small e, dieresis or umlaut mark |
| Ë | Ë | capital E, dieresis or umlaut mark |
| í | í | small i, acute accent |
| Í | Í | capital I, acute accent |
| î | î | small i, circumflex accent |
| Î | Î | capital I, circumflex accent |
| ì | ì | small i, grave accent |
| Ì | Ì | capital I, grave accent |
| ï | ï | small i, dieresis or umlaut mark |
| Ï | Ï | capital I, dieresis or umlaut mark |
| ñ | ñ | small n, tilde |
| Ñ | Ñ | capital N, tilde |
| ó | ó | small o, acute accent |
| Ó | Ó | capital O, acute accent |
| ô | ô | small o, circumflex accent |
| Ô | Ô | capital O, circumflex accent |
| ò | ò | small o, grave accent |
| Ò | Ò | capital O, grave accent |
| ø | ø | small o, slash |
| Ø | Ø | capital O, slash |
| õ | õ | small o, tilde |
| Õ | Õ | capital O, tilde |
| ö | ö | small o, dieresis or umlaut mark |
| Ö | Ö | capital O, dieresis or umlaut mark |
| ß | ß | small sharp s, German (sz ligature) |
| þ | þ | small thorn, Icelandic |
| Þ | Þ | capital THORN, Icelandic |
| ú | ú | small u, acute accent |
| Ú | Ú | capital U, acute accent |
| û | û | small u, circumflex accent |
| Û | Û | capital U, circumflex accent |
| ù | ù | small u, grave accent |
| Ù | Ù | capital U, grave accent |
| ü | ü | small u, dieresis or umlaut mark |
| Ü | Ü | capital U, dieresis or umlaut mark |
| ý | ý | small y, acute accent |
| Ý | Ý | capital Y, acute accent |
| ÿ | ÿ | small y, dieresis or umlaut mark |
| ½ | ½ | fraction one-half |
| ½ | ½ | fraction one-half |
| ¼ | ¼ | fraction one-quarter |
| ¾ | ¾ | fraction three-quarters |
| ¹ | ¹ | superscript one |
| ² | ² | superscript two |
| ³ | ³ | superscript three |
| ± | ± | plus-or-minus sign |
| < | < | less-than sign |
| > | > | greater-than sign |
| ¤ | ¤ | general currency sign |
| £ | £ | pound sign |
| ¢ | ¢ | cent sign |
| ¥ | ¥ | yen sign |
| & | & | ampersand |
| µ | µ | micro sign |
| ° | ° | degree sign |
| º | º | ordinal indicator, masculine |
| ª | ª | ordinal indicator, feminine |
| § | § | section sign |
| ¶ | ¶ | pilcrow (paragraph sign) |
| · | · | middle dot |
| © | © | copyright sign |
| ® | ® | registered sign |
| ¦ | ¦ | broken (vertical) bar |
| ¬ | ¬ | not sign |
| ¡ | ¡ | inverted exclamation mark |
| ¿ | ¿ | inverted question mark |
| « | « | angle quotation mark, left |
| » | » | angle quotation mark, right |
| | no break (required) space | |
| ­ | | soft hyphen |