Glossary

Glossary

An alphabetical index of ISDL keywords, field types, and common parameters. Each entry links to the full documentation.

Can't find what you need here? Try the How Do I…? task index or browse the Fields and Logic Reference pages directly.

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A

action — A button rendered on a character sheet that runs logic when clicked. Defined with action <Name> { ... }. Docs

actor — A document type that represents a character, creature, or other entity with a sheet. Defined with actor <Name> { ... }. Docs

and — Logical AND operator. Both conditions must be true. Docs

attribute — A field type storing a score with a derived modifier (e.g. D&D STR 16 / +3). Optionally add roll: or function: for a click handler. Docs

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B

background: — Parameter on page or actor/item that sets the decorative sheet background pattern (e.g. bricks, topography). Docs

boolean — A simple yes/no checkbox field. Also valid as a value:-computed read-only flag. Docs

bonuses — A display field that shows a summary table of all damage-type bonuses from Active Effects. Used with choice<damageType>. Docs

border { } — A theme block for setting the color, width, and corner radius of field and container borders. Docs

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C

calculator: — Parameter on number fields. Set true to always show the calculator button, false to never show it. Automatically shown when max > 10. Docs

chat — A block inside an action that posts a card to the Foundry chat log. chat <Name> { ... }. Docs

choice<damageType> — A dropdown that auto-generates Active Effects fields for damage bonuses and resistances. Docs

choice<string> — A dropdown field with predefined string choices and rich metadata (icons, colors, extra data). Docs

choice<DocumentType> — Links to a single document via a searchable dropdown instead of drag-and-drop. Docs

choices<string> — A multi-select picker variant of choice<string>. Docs

choices<DocumentType> — Links to multiple documents via a searchable dropdown with a configurable maximum. Docs

color: — Standard parameter on any field. Sets the accent color. On number fields, also colorizes the icon. Docs

column — A layout block that stacks its children vertically. Used inside row to create multi-column layouts. Docs

Combat.isMyTurn — Boolean expression that is true when it is this character's turn in the active combat. Docs

Combat.nextTurn() — Advances combat to the next combatant's turn. Docs

config — Required top-level block that sets the system ID, label, description, theme, settings, and sidecar stylesheets. Docs

crit: — Parameter on roll(...) that sets the threshold for a critical-hit flag. The roll result gains .crit = true. Docs

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D

damage() — A function for creating typed damage objects, used with choice<damageType> fields. Docs

damageTrack — A World of Darkness–style click-to-fill damage track with named severity buckets. Docs

date — A field that stores a real-world date value. Docs

datetime — A field that stores both a date and time. Docs

death status — Prefix on a status declaration that marks it as the death effect (applied when HP ≤ 0). Only one per actor. Docs

default: — Parameter on actor/item declarations. default: true makes this the pre-selected type when creating a new document. Docs

die — A field that stores a single die value (d4, d6, d8…) with smart step operations. Docs

dice — A field that stores a dice-pool expression like "2d6". Docs

disabledText { } — A theme block that controls the color and size of read-only (play-mode) text. Docs

display: — Parameter on money fields. Controls how multi-denomination currency is shown (breakdown, primary, consolidated). Docs

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E

each — Loop keyword. each item in self.Equipment { ... } iterates over a collection or range. Docs

edit — Visibility shorthand. The field or action is only visible in Edit Mode. Docs

elevation: — Not a direct ISDL keyword; control section card elevation (shadow) via the sidecar stylesheet or theme: overrides. Docs

equals — Preferred equality comparison operator (alternative: ==). Docs

eternal — Declares an immutable constant variable inside an action or function. Docs

exists — Checks whether an optional field has a value. Use self.Field exists before accessing it. Docs

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F

fields: — Parameter on table that lists which columns to display by default (bare identifiers, not quoted). Docs

flavor — Line inside a chat { } block that renders as the card's flavor text at the top. Docs

fleeting — Declares a mutable temporary variable inside an action or function. Docs

font { } — A theme block that sets the body font family and base size. Docs

function — A named, reusable block of logic that can be called from actions and calculated values. Docs

fumble: — Parameter on roll(...) that sets the threshold for a fumble flag. The roll result gains .fumble = true. Docs

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G

globalStyles = — Config option pointing to a .scss file scoped to the entire system (sheets, chat cards, dialogs). Docs

gmEdit — Visibility shorthand. GMs can edit; owners and viewers can only read. Docs

gmOnly — Visibility shorthand. Only GMs can see or interact with this field. Docs

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H

has — Contains operator. self.Tags has "magic" checks if a collection includes a value. Docs

health — Modifier on resource that marks it as the primary health pool (red/green bar, token bar 1, damage applicator target). Docs

heading { } — A theme block that sets the color, font, size, and CSS transform for card titles and the document name. Docs

hidden — Visibility shorthand. The field is never rendered on the sheet but is still stored. Docs

hideLabel: — Parameter that hides a field's label (and notch) from the sheet. Docs

hint: — Parameter on settings. Shows descriptive text under the setting name in the settings menu. Docs

html — A rich-text, multi-line formatted text field. Renders twice as wide as other fields. Docs

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I

icon: — Standard parameter on any field or action. Sets a Font Awesome icon. Docs

image — A click-to-edit image field. Add primary: true to bind it to the document's portrait. Docs

imageAction: — Parameter on table that makes each row's image clickable, running the named action on that item. Docs

initial: — Parameter on number-based fields. Sets the starting value at document creation. Can be a static literal or a computed expression (applied once). Docs

inventory — A visual grid-based inventory field with drag-and-drop. Docs

item — A document type for things characters own (spells, equipment, features…). Docs

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K

keywords — A block inside config for defining reusable game mechanic terms that auto-generate player journals. Docs

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L

label: — Standard parameter on any field. Overrides the English display label without changing the field ID. Docs

limit: — Parameter on prompt(...). Sets a time limit for the user to respond before the prompt times out. Docs

log() — Development helper that writes to the browser console. Docs

locked — Visibility shorthand. The field is visible and read-only for everyone; Active Effects cannot edit it. Docs

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M

macro action — Modifier on action that makes it eligible to be dragged to the Foundry macro hotbar. Docs

macro — A field type that stores an executable Foundry macro. Docs

Math.abs() / Math.ceil() / Math.floor() / Math.max() / Math.min() / Math.round() — Built-in math functions available in all logic. Docs

max: — Parameter on number-based fields. Sets the maximum allowed value. Can be a computed expression. Docs

measuredTemplate — A field that stores Foundry measured template data for area-of-effect placement. Docs

min: — Parameter on number-based fields. Sets the minimum allowed value. Docs

mod: — Parameter on attribute fields. A method block that derives the modifier from the raw score. If omitted, the score is the modifier. Docs

money — A currency field with single or multi-denomination support, calculator, and automatic conversion. Docs

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N

number — A basic numeric field with optional min, max, initial, value, and calculator support. Docs

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O

on — Declares a hook handler that runs automatically when a game event fires (e.g. on turnStart { ... }). Docs

or — Logical OR operator. Either condition can be true. Docs

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P

page — A layout block that adds a new tab to the sheet. page <Name> { ... }. Docs

paperdoll — A visual equipment-slot overlay on a character image. Docs

parent — Inside an item action, refers to the owning actor. Requires a if (parent is SomeActor) type guard. Docs

parent<type> — A picker field that lets users choose one of the parent actor's typed fields. Docs

pinned — A display field showing all items the user has pinned, with their actions. Docs

play — Visibility shorthand. The field or action is only visible in Play Mode. Docs

play() — Plays a sound file. play(file: "sounds/hit.wav", volume: 75). Docs

primary: — Parameter on image fields. primary: true binds the field to the document's native portrait/token image. Docs

prompt() — Opens an input dialog to collect user input mid-action. Docs

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R

readonly — Visibility shorthand. The field is visible to all but never editable or clickable. Docs

resistances — A display field that shows a summary table of damage-type resistances from Active Effects. Docs

resource — A field with current, temp, and max sub-fields. Renders as an animated bar. Mark with health or wounds for special treatment. Docs

returns — Part of function syntax: function Name(...) returns number { ... }. Declares what type the function returns. Docs

roll() — The dice-rolling function. Accepts Foundry dice expressions with optional ISDL field references. Returns a roll object. Docs

rollVisualizer — A display field that charts the probability distribution, average, and min/max of a dice formula. Docs

row — A layout block that places its children side by side horizontally. Docs

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S

secret — Visibility shorthand. Hidden from non-owner viewers; visible to GMs and owners. Docs

section — A layout block that groups related fields in a labeled card on the sheet. Docs

self — Inside any action or function, refers to the document the action is attached to. Docs

self<type> — A picker field that lets users choose one of the same document's typed fields at play time. Docs

self.update() — Forces pending document changes to apply immediately within the current action. Docs

settings — A block inside config for declaring Foundry game settings (world or client scope). Docs

sheetStyles = — Config option pointing to a .scss file scoped to the generated character sheets only. Docs

status — Declares a status-effect icon that can be manually or automatically applied to an actor. Docs

string — A single-line text field. Can be restricted to a list of choices for a plain dropdown. Docs

style: — Parameter on tracker fields. Controls the visual presentation: bar, segmented, icons, slashes, dial, clock, or plain. Docs

System.<Name> — Read or write a declared game setting from logic. Docs

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T

table — A layout element for item lists (table<ItemType> <Name>) or custom data tables. Docs

tag — Line inside chat { } that renders a small chip at the bottom of the card. Docs

target — Inside an action, refers to the currently targeted Foundry token. Guard with if (target is SomeType). Docs

theme { } — Block inside config for system-wide style tokens (colors, fonts, borders). Also usable as theme: on individual fields. Docs

time — A field that stores a real-world time value. Docs

tracker — A slimmed-down resource field with multiple visual styles (bar, segmented, clock…). Docs

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U

unlocked — Visibility shorthand. The field is always read/write for everyone with read access. Docs

User.isGM — Boolean expression that is true when the person clicking is a Gamemaster. Docs

User.name — String expression with the current user's display name. Docs

userColors = — Config option. Set false to disable per-document color pickers and lock the system theme. Docs

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V

value: — Parameter on most field types. When set, the field always equals this result (static or computed). Makes the field read-only. Docs

visibility: — Parameter on any field or action. Accepts a Visibility.X constant or a method block returning one, for conditional show/hide/lock logic. Docs

Visibility.default — Show for all; edit in Edit Mode only. The assumed value when nothing is returned. Docs

Visibility.edit — Visible and editable only in Edit Mode. Docs

Visibility.gmOnly — Only visible to GMs. Docs

Visibility.hidden — Not rendered on the sheet at all. Docs

Visibility.locked — Read-only for everyone; Active Effects cannot edit. Docs

Visibility.play — Visible and usable only in Play Mode. Docs

Visibility.readonly — Visible to all; never clickable or editable. Docs

Visibility.secret — Hidden from non-owner viewers. Docs

Visibility.unlocked — Always read/write for everyone with read access. Docs

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W

wait — Pauses an action for a given duration. wait 3 seconds. Docs

when: — Parameter on status declarations. A condition expression that auto-applies the status when true. Docs

where: — Filter expression on table, inventory, and document-choice fields. item is the alias for each element being tested. Docs

wide — Line inside chat { } that renders the expression full-width. Docs

width { } / height { } — Theme blocks for constraining a field's or container's dimensions. Field-only tokens (not valid in global config { theme }). Docs

wounds — Modifier on resource that marks it as a wounds-style pool (empty = fine, full = in trouble) with a blue/teal gradient. Docs

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Z

zoom: — Parameter on actor/item declarations. Scales the sheet contents by a percentage. Docs