| DefaultFontSubstitutionRule | Default font substitution rule. |
| FileFontSource | Represents the single TrueType font file stored in the file system. |
| FolderFontSource | Represents the folder that contains TrueType font files. |
| FontConfigSubstitutionRule | Font config substitution rule. |
| FontEmbeddingLicensingRights | Represents embedding licensing rights for the font. |
| FontFallbackSettings | Specifies font fallback mechanism settings. |
| FontInfoSubstitutionRule | Font info substitution rule. |
| FontNameSubstitutionRule | Font substitution rule for processing font name. |
| FontSettings | Specifies font settings for a document. |
| FontSourceBase | This is a base class for the classes that allow the user to specify various font sources. |
| FontSubstitutionRule | This is an abstract base class for the font substitution rule. |
| FontSubstitutionSettings | Specifies font substitution mechanism settings. |
| MemoryFontSource | Represents the single TrueType font file stored in memory. |
| PhysicalFontInfo | Specifies information about physical font available to Wordize font engine. |
| StreamFontSource | Base class for user-defined stream font source. |
| SystemFontSource | Represents all TrueType fonts installed to the system. |
| TableSubstitutionRule | Table font substitution rule. |