In this section we give the data format of each field. Optional fields are in brackets or are marked as ``optional".
| Keyword | Format, Value, Range, Units | Notes |
| PI Name | Alphanumeric max 32 char. | First, Middle, Last |
| Laboratory Institute | Alphanumeric max 32 char. | |
| Country | Alphanumeric max 24 char. | |
| Zonal Code | Alphanumeric 6 char. | |
| City | Alphanumeric 24 char. | |
| Street | Alphanumeric 24 char. | |
| Street Number | Alphanumeric 5 char. | optional |
| Telephone Number | Alphanumeric 20 char. | |
| Telefax Number | Alphanumeric 20 char. | optional |
| Email Address | Alphanumeric 50 char. | |
| COI1 Name | Alphanumeric 32 char. | essential if TOO proposal |
| COI1 Laboratory Institute | Alphanumeric 32 char. | essential if TOO proposal |
| COI1 Country | Alphanumeric 24 char. | essential if TOO proposal |
| COI1 Telephone Number | Alphanumeric 20 char. | essential if TOO proposal |
| COI1 Telefax Number | Alphanumeric 20 char. | optional |
| COI1 Email Address | Alphanumeric 50 char. | essential if TOO proposal |
| COI2 Name | Alphanumeric 32 char. | for each Co.I. |
| COI2 Laboratory Institute | Alphanumeric 32 char. | for each Co.I. |
| COI2 Country | Alphanumeric 24 char. | for each Co.I. |
| Announcement Of Opportunity | Alphanumeric 3 char. | default AO5 |
| Reference | ||
| Observation Program | Alphanumeric max 3 char. | GOP |
| Reference | ||
| Proposal Title | Alphanumeric max 48 char. | |
| Proposal Abstract | Alphanumeric max 600 char. | |
| Proposal Subject Category | Numeric 1 char. | |
| 1 = Stars | ||
| 2 = Compact Galactic Sources | ||
| 3 = SNR | ||
| 4 = Normal galaxies | ||
| 5 = AGN | ||
| 6 = Cluster of Galaxies | ||
| 7 = Other |
| Keyword | Format, Value, Range, Units, | Notes |
| Proposal Type | Alphanumeric 8 char. | STANDARD or TOO |
| Total Observing Time | Integer max 4 digits | units=ksec |
| Proposal Date | Alphanumeric | |
| DD-MMM-YYYY | (HH:MM:SS.ss) | |
| Type Of Media | Alphanumeric 7 char. | DAT |
| Media Density | Alphanumeric | COMPRESSED |
| Institution Authority | Alphanumeric 32 char. | |
| Endorsing the Proposal |
| Keyword | Format, Value, Range, Units, | Notes |
| Target Name | Alphanumeric max 16 char. | optional for TOO proposals |
| Pointing Alpha Coordinate | Alphanumeric | optional for TOO proposals |
| hh mm ss.s range 0,24 | J2000 coordinate | |
| Pointing Delta Coordinate | Alphanumeric | optional for TOO proposals |
| +/-dd mm ss range -90,+90 | J2000 coordinate | |
| Instrument Class | Alphanumeric | NFI, WFC |
| WFC Maximum Pointing | Real Number range 0,15 | only if WFC |
| Offset | ||
| Time Constraint | Alphanumeric | |
| None | ||
| Fully Constrained | specify 1 Time Window | |
| Partially Constrained | specify up to 5 Time Windows | |
| Periodically Repeated | ||
| Aperiodically Repeated | ||
| Phase Dependent | ||
| Special Cases | details in ADDITIONAL_INFO | |
| Number Of Pointings | Integer  100 |
| Keyword | Format, Value, Range, Units, | Notes |
| Time Window 1 Start | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 1 End | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 2 Start | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 2 End | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 3 Start | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 3 End | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 4 Start | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 4 End | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 5 Start | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| Time Window 5 End | Alphanumeric DD-MMM-YYYY | (HH:MM:SS.ss) |
| For Periodically Repeated | ||
| Period | Alphanumeric DD (HH:MM:SS.ss) | |
| Period Tolerance | Real % range  ,100 |
|
| For Aperiodically Repeated | ||
| Time Spacing 1 | days (integer) | |
| Time Spacing 2 | days (integer) | |
| Time Spacing 3 | days (integer) | |
| Time Spacing 4 | days (integer) | |
| Time Spacing 5 | days (integer) | |
| Time Spacing 6 | days (integer) | |
| Time Spacing 7 | days (integer) | |
| Time Spacing 8 | days (integer) | |
| Time Spacing 9 | days (integer) | |
| Time Spacing 10 | days (integer) | |
| Time Spacing Tolerance | Real % range  0,100 |
|
| For Phase Dependent | ||
| Phase | Real range 0.0,1.0 | |
| Phase Tolerance | Real % range 0,100 |
|
| Binary Period | Alphanumeric DD (HH:MM:SS.ss) | |
| Epoch Of Zero Phase | Alphanumeric DD-MMM-YYY | HH:MM:SS.ss |
| TRU Speed | Alphanumeric 1 char. | Default is D, |
| other possibility is H |
| Keyword | Format, Value, Range, Units, | Notes |
| Instrument Code | Alphanumeric max 6 char. | |
| LECS | if Instrument Class = NFI | |
| MECS | if Instrument Class = NFI | |
| PDS | if Instrument Class = NFI | |
| HPGSPC | if Instrument Class = NFI | |
| WFC | if Instrument Class = WFC | |
| Observation Duration | Integer max 5 digits | units=ksec |
| Data Collecting Mode | Alphanumeric max 25 char. | see SOH |
| Collimator Law | Integer max 2 digits | if HPGSPC or PDS |
| fixed to 3 for HPGSPC | ||
| range 1-22 for PDS | ||
| Collimator Law Stay Time | Integer max 4 digits | if PDS |
| range 50, 2047, in seconds | ||
| Count Rate | Real, range 0 |
optional |
| Spectrum Accumulation Time | Real | if HPGSPC or PDS the value |
| range depends on the chosen | ||
| (indirect) DCM | ||
| TP Bin Accumulation Time | Real | if HPGSPC or PDS the value |
| range depends on the chosen | ||
| (indirect) DCM | ||
| MECS Active Units | Real, 2 (fixed value) | if MECS |