Incidents of gender-bending are classified into the following categories:
    
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                                Alternate
            
- Applies to derivative and alternate universe works only. Indicates a story which explores how things might differ had the given character been born the opposite gender.
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                                Alternate Perspective
            
- This category is primarily for songs and refers to an incident where a cover of a song explores the same event(s) from another gender perspective.
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                                Androgyny
            
- The character is androgynous enough that they unintentionally get mistaken for the opposite sex as a significant plot point.
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                                Body Swap
            
- A male and a female character trade bodies, whether voluntarily or involuntarily.
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                                Clone
            
- The character in question is an opposite-gender clone with memories from the original.
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                                Cross-Dressing
            
- This should be fairly obvious. The only notable point is that this definition is based on the effect on other people, so it can be accidental.
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                                Hermaphrodite
            
- The character in question has a complete set of both male and female sexual organs. (Fiction's interpretation of hermaphroditism)
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                                Illusion
            
- The character in question appears to be the opposite sex (whether voluntarily or not) without altering their physical form. This may or may not include cross-dressing but generally involves science fiction or magic.
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                                Intersexed
            
- The character in question meets the real-world definition of intersexuality. (eg. AIS, real-world hermaphroditism, etc.)
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                                Multiple Personalities
            
- A character with multiple personalities where not all are of the same gender.
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                                Partial
            
- Typically, this means transformation of just the genitals, everything but the genitals, or the addition of breasts to an otherwise male body. (Usually for comedic purposes)
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                                Perspective Mismatch
            
- This category is primarily for songs and indicates situations where the lyrics are in disagreement with the singer's voice over the subject's gender.
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                                Possession
            
- A variation on body swapping where a deceased or otherwise disembodied character occupies a freshly-vacated body of the opposite gender.
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                                Surgery
            
- Surgical gender-reassignment. Unlike "Transformation" this keyword indicates that the change bears all the limitations of modern gender-reassignment surgery.
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                                Timeshare
            
- A male and a female character time-sharing a variable-form body
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                                Transformation
            
- Transformation from male to female or vice-versa, whether scientific or magical in nature.
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                                Transgendered
            
- A person whose instinctual gender identity does not match their physical sex. Usually implies what other characters see as cross-dressing.