AAF Format Definition This are the main points of the official format specification of the exchange format for astrological data, AAF (not all details have been translatetd in english).
3 Feb 1997

1. Introduction

2. The basic structure of AAF data

• 2.1 The #A93 chunk: Human readable chart-info data
• 2.2 The #B93 chunk: Machine readable chart-info data
• 2.3 The #SRC, #VIA and #COM chunks: Annotations
• 2.4 The #ZNAM chunk: The time zone abbreviation
• 2.5 The invisible #: chunk

3. Automatically generated chunks

• 3.1 The #LPOS chunk: Ecliptic longitude in the tropical zodiac
• 3.2 The #BPOS chunk: Ecliptic latitude
• 3.3 The #ZPOS chunk: Heliocentric position data
• 3.4 The #GVAL chunk: Ecliptic longitude speed
• 3.5 The #HPOS chunk: Cusp positions
• 3.6 The #ASP chunk: Aspects

4. #SUB horoscope records

• 4.1 The #SUBx_ALT record: Alternate data from a different source
• 4.2 The #SUBx_RET record: Solar and lunar return charts