v := ziva.DefaultValidators

// Required field
v.Required()

// Minimum length
v.MinLength(5)

// Maximum length
v.MaxLength(100)

// Exact length
v.Length(8)

// Numeric range
v.Range(1, 100)

// Email
v.Email()
v.OptionalEmail()

// IP addresses
v.IP()    // IPv4 or IPv6
v.IPv4()  // IPv4 only
v.IPv6()  // IPv6 only

// Domain and URL
v.Domain()
v.URL()

// Port
v.Port() // 1-65535

// Standard password (min 8 characters)
v.StandardPassword()

// Strong password (min 12 characters)
v.StrongPassword()