For a lot of fields, there are specific sets of values that are required or accepted in order for them to work properly with other programs. This document has a list of the most common sets of values along with descriptions, where available.

Below is a list of chip types and a brief description of each:

Value	Description
cpu	Represents a CPU chip on a machine
audio	Represents an audio processing chip on a machines

Below is a list of control types and a brief description of each:

Value	Description
joy	There is no information available at this time.
stick	There is no information available at this time.
paddle	There is no information available at this time.
pedal	There is no information available at this time.
lightgun	There is no information available at this time.
positional	There is no information available at this time.
dial	There is no information available at this time.
trackball	There is no information available at this time.
mouse	There is no information available at this time.
only_buttons	There is no information available at this time.
keypad	There is no information available at this time.
keyboard	There is no information available at this time.
mahjong	There is no information available at this time.
hanafuda	There is no information available at this time.
gambling	There is no information available at this time.

If you have more information on any of the above values, please open a GitHub issue or a pull request.

Below is a list of device types and a brief description of each:

Value	Description
unknown	There is no information available at this time.
cartridge	There is no information available at this time.
floppydisk	There is no information available at this time.
harddisk	There is no information available at this time.
cylinder	There is no information available at this time.
cassette	There is no information available at this time.
punchcard	There is no information available at this time.
punchtape	There is no information available at this time.
printout	There is no information available at this time.
serial	There is no information available at this time.
parallel	There is no information available at this time.
snapshot	There is no information available at this time.
quickload	There is no information available at this time.
memcard	There is no information available at this time.
cdrom	There is no information available at this time.
magtape	There is no information available at this time.
romimage	There is no information available at this time.
midiin	There is no information available at this time.
midiout	There is no information available at this time.
picture	There is no information available at this time.
vidfile	There is no information available at this time.

If you have more information on any of the above values, please open a GitHub issue or a pull request.

Below is a list of display types and a brief description of each:

Value	Description
raster	Machine uses raster graphics
vector	Machine uses vector graphics
lcd	Machine uses an LCD display
svg	Machine uses an SVG overlay
unknown	Display type is unknown

Below is a list of endianness values and a brief description of each:

Value	Description
big	Represents big-endian architecture
little	Represents little-endian architecture

Below is a list of feature statuses and a brief description of each:

Value	Description
unemulated	This feature is considered entirely unemulated.
imperfect	This feature has issues with emulation.

Below is a list of feature types and a brief description of each:

Value	Description
protection	There is no information available at this time.
palette	There is no information available at this time.
graphics	There is no information available at this time.
sound	There is no information available at this time.
controls	There is no information available at this time.
keyboard	There is no information available at this time.
mouse	There is no information available at this time.
microphone	There is no information available at this time.
camera	There is no information available at this time.
disk	There is no information available at this time.
printer	There is no information available at this time.
lan	There is no information available at this time.
wan	There is no information available at this time.
timing	There is no information available at this time.

If you have more information on any of the above values, please open a GitHub issue or a pull request.

Below is a list of item statuses and a brief description of each:

Value	Description
good	Item is considered to be a good dump of the original media
baddump	Item is considered to be a bad dump of the original media
nodump	Item has not been dumped (or properly dumped) from the original media
verified	Item is considered to be a good dump and verified against other dumps of the same media

Below is a list of item types and a brief description of each:

Value	Description
adjuster	Analog Adjusters for a game.
analog	Analog mask of a port.
archive	Archive name.
biosset	BIOS sets for a device.
blank	Internal type used as a placeholder.
chip	CPU and Sound chips used by a game.
condition	Condition required to use I/O port field/setting.
configuration	Output configuration information.
control	Single controller information for a machine.
dataarea	There is no information available at this time.
device	Single device for a machine.
device_ref	Subdevice for a machine.
dipswitch	Dipswitch configuration information.
disk	CHD file information.
diskarea	There is no information available at this time.
display	Machine display information.
driver	Driver status.
extension	Extension value for filtering.
feature	Emulation features of a machine.
info	There is no information available at this time.
input	Represents a single input for a machine.
instance	Image device instance.
location	Location information for a dipswitch (diplocation) or configuration (conflocation).
media	Aaruformat file information.
part	There is no information available at this time.
partfeature	There is no information available at this time.
port	Input ports in the driver.
ramoption	RAM options for a system.
release	There is no information available at this time.
rom	Represents generic file information
sample	Reference to a specific (usually WAV-formatted) sample file
setting	Setting information for a dipswitch (dipvalue) or configuration (confsetting).
sharedfeat	There is no information available at this time.
slot	Represents a single slot on a machine, such as a cartridge or controller slot
slotoption	Represents a single option for a given slot, contains name of another set representing the option
softwarelist	Software list associated with the machine
sound	Speakers for a machine

If you have more information on any of the above types, please open a GitHub issue or a pull request.

Below is a list of loadflags and a brief description of each:

Value	Description
load16_byte	There is no information available at this time.
load16_word	There is no information available at this time.
load16_word_swap	There is no information available at this time.
load32_byte	There is no information available at this time.
load32_word	There is no information available at this time.
load32_word_swap	There is no information available at this time.
load32_dword	There is no information available at this time.
load64_word	There is no information available at this time.
load64_word_swap	There is no information available at this time.
reload	There is no information available at this time.
fill	There is no information available at this time.
continue	There is no information available at this time.
reload_plain	There is no information available at this time.
ignore	There is no information available at this time.

If you have more information on any of the above values, please open a GitHub issue or a pull request.

Below is a list of log levels and a brief description of each:

Value	Description
verbose	All logs (default)
user	No verbose logs
warning	Only warnings and errors
error	Only errors

Below is a list of machine types and a brief description of each:

Value	Description
bios	BIOS set, usually something like original hardware that other software ran on but is useless by itself
device	Device set, usually a peripheral or other "device" that could be attached to another machine
mechanical	Mechanical set, usually a machine with no screen or otherwise logic only. Sometimes applied to pinball machines

Below is a list of nodump modes and a brief description of each:

Value	Description
obsolete	There is no information available at this time.
required	There is no information available at this time.
ignore	There is no information available at this time.

If you have more information on any of the above values, please open a GitHub issue or a pull request.

Below is a list of openMSX subtypes and a brief description of each:

Value	Description
rom	There is no information available at this time.
megarom	There is no information available at this time.
sccpluscart	There is no information available at this time.

If you have more information on any of the above values, please open a GitHub issue or a pull request.

Below is a list of packing modes and a brief description of each:

Value	Description
zip	This mode instructs the program to rebuild all sets to named archives.
unzip	This mode instructs the program to rebuild all sets to named folders.
partial	This mode instructs the program to rebuild all sets that have more than one item to named folders, with the rest rebuilt to the output folder without named subfolders.
flat	This mode instructs the program to rebuild all sets to the output folder without named subfolders.

Please note that both partial and flat are not common and may not be supported as header flags in all programs.

Below is a list of strings that can be used to act as placeholders for prefix and postfix additions. If the field in question does not exist, it will replace it with an empty string instead:

Value	Description
%game%, %machine%	Replaced with the game/machine name
%name%	Replaced with the item name
%manufacturer%	Replaced with game/machine manufacturer
%publisher%	Replaced with game/machine publisher
%category%	Replaced with game/machine category
%crc%	Replaced with item CRC32 hash
%md5%	Replaced with item MD5 hash
%ripemd160%	Replaced with item RIPEMD160 hash (Only available in .NET Framework 4.8 builds)
%sha1%	Replaced with item SHA-1 hash
%sha256%	Replaced with item SHA-256 hash
%sha384%	Replaced with item SHA-384 hash
%sha512%	Replaced with item SHA-512 hash
%size%	Replaced with item size
%spamsum%	Replaced with item SpamSum fuzzy hash

More fields may be supported in the future. Please open a GitHub issue or a pull request to add them.

Below is a list of relations and a brief description of each:

Value	Description
eq	Equals
ne	Not equals
gt	Greater than
le	Not greater than
lt	Less than
ge	Not less than

Below is a list of softwarelist statuses and a brief description of each:

Value	Description
original	This software list represents original media for a machine.
compatible	This software list represents media that is compatible with the machine.

Below is a list of support statuses and a brief description of each:

Value	Description
good	Item is properly supported.
imperfect	Item is partially supported.
preliminary	Item either has no support or a skeleton.

Below is a list of supported values and a brief description of each:

Value	Description
no	Machine is not supported currently.
partial	Machine is in partially runnable state.
yes	Machine should be fully supported.