A diacritical mark is a "glyph" added to a letter. Some diacritical marks, like grave ( ̀ ) and acute ( ́ ) are called accents. Diacritical marks can appear both above and below a letter, inside a letter, or between two letters. They can be used in combination with alphanumeric characters, to produce a character that is not present in the character set (encoding) used in the HTML document.
To construct a diacritical mark with a character, you need to first type the character, then add the entity for the diacritical mark. For example:
| Mark | Character | Entity Construction | Result |
|---|---|---|---|
| ̀ | a | à | à |
| ́ | u | ú | ú |
| ̂ | i | î | î |
| ̃ | n | ñ | ñ |
| ̀ | E | È | È |
| ́ | Y | Ý | Ý |
| ̂ | O | Ô | Ô |
| ̃ | A | Ã | Ã |
The purpose of entities are starting to make sense now!