Desktop Entry Specification

File naming

Type=Directory if my_file.endswith(".directory") else my_file.endswith(".desktop")
reverse DNS
D-Bus well-known name
my_domain[0].isdigit() if f"_{my_domain}" else my_domain
my_domain.replace("-", "_")

[Desktop Entry]

Key	Value Type	REQ?	Condition	Value
`Type`	string	YES		`Application`, `Link`, `Directory`
`Name`	localestring	YES
`Icon`	iconstring	NO
`Exec`	string	NO
`Terminal`	boolean	NO
`Categories`	string(s)	NO		desktop-menu-specification
`StartupWMClass`	string	NO		`xprop WM_CLASS`
`URL`	string	YES	`Type=Link`