dt_date – Session date and time in full datetime form (e.g., "2025-05-24 03:00:00").
dt_time – Time component for the session start (e.g., "08:30:00").
dtl_date – Localized datetime value for the session.
i_day – Numeric day-of-week indicator.
i_duration – Duration of the class in minutes.
is_cancel – Cancellation flag ("0" for active, "1" for canceled).
is_event – Indicates whether the session is an event vs. a regular class.
k_class – Unique class key.
k_class_period – Unique key for this specific class period/instance.
k_location – Location key where the class is held.
s_title – Class title/name (e.g., "Free Class").
text_timezone – Time zone label for the times returned (e.g., "BRT").
url_book – Booking URL for this specific session.
a_image – Image metadata for the class (height, width, URLs) or empty object/array when no image is set.
html_description – HTML-formatted class description.
i_book – Current number of bookings for the session.
i_capacity – Maximum capacity for the session (e.g., 10).
i_wait – Current waitlist size.
is_wait_list_enabled – Boolean flag indicating if waitlisting is enabled.
a_staff – Array of internal staff IDs assigned to the class.
a_staff_uid – Array of staff user IDs associated with the session.
a_virtual_location – Details of associated virtual/location settings (empty array if not virtual).
hide_application – Flag that controls visibility in certain client UIs.
is_virtual – Boolean flag indicating whether the session is virtual/online.
a_class_tab – Tab/category information for where this class appears in the schedule.