Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries. Use when working with .base files, creating database-like views of notes, or when the user mentions Bases, table views, card views, filters, or formulas in Obsidian.

Obsidian Bases Skill This skill enables skills compatible agents to create and edit valid Obsidian Bases ( .base files) including views, filters, formulas, and all related configurations. Overview Obsidian Bases are YAML based files that define dynamic views of notes in an Obsidian vault. A Base file can contain multiple views, global filters, formulas, property configurations, and custom summaries. File Format Base files use the .base extension and contain valid YAML. They can also be embedded in Markdown code blocks. Complete Schema Filter Syntax Filters narrow down results. They can be applied globally or per view. Filter Structure Filter Operators Operator Description == equals != not equal greater than < less than = greater than or equal <= less than or equal && logical and \ \ logical or <code !</code logical not Properties Three Types of Properties 1. Note properties From frontmatter: note.author or just author 2. File properties File metadata: file.name , file.mtime , etc. 3. Formula properties Computed values: formula.my formula File Properties Reference Property Type Description file.name String File name file.basename String File name without extension file.path String Full path to file file.folder String Parent folder path file.ext String File extension file.size Number File size in bytes file.ctime Date Created time file.mtime Date Modified time file.tags List All tags in file file.links List Internal links in file file.backlinks List Files linking to this file file.embeds List Embeds in the note file.properties Object All frontmatter properties The this Keyword In main content area: refers to the base file itself When embedded: refers to the embedding file In sidebar: refers to the active file in main content Formula Syntax Formulas compute values from properties. Defined in the formulas section. Functions Reference Global Functions Function Signature Description date() date(string): date Parse string to date. Format: YYYY MM DD HH:mm:ss duration() duration(string): duration Parse duration string now() now(): date Current date and time today() today(): date Current date (time = 00:00:00) if() if(condition, trueResult, falseResult?) Conditional min() min(n1, n2, ...): number Smallest number max() max(n1, n2, ...): number Largest number number() number(any): number Convert to number link() link(path, display?): Link Create a link list() list(element): List Wrap in list if not already file() file(path): file Get file object image() image(path): image Create image for rendering icon() icon(name): icon Lucide icon by name html() html(string): html Render as HTML escapeHTML() escapeHTML(string): string Escape HTML characters Any Type Functions Function Signature Description isTruthy() any.isTruthy(): boolean Coerce to boolean isType() any.isType(type): boolean Check type toString() any.toString(): string Convert to string Date Functions & Fields Fields: date.year , date.month , date.day , date.hour , date.minute , date.second , date.millisecond Function Signature Description date() date.date(): date Remove time portion format() date.format(string): string Format with Moment.js pattern time() date.time(): string Get time as string relative() date.relative(): string Human readable relative time isEmpty() date.isEmpty(): boolean Always false for dates Date Arithmetic String Functions Field: string.length Function Signature Description contains() string.contains(value): boolean Check substring containsAll() string.containsAll(...values): boolean All substrings present containsAny() string.containsAny(...values): boolean Any substring present startsWith() string.startsWith(query): boolean Starts with query endsWith() string.endsWith(query): boolean Ends with query isEmpty() string.isEmpty(): boolean Empty or not present lower() string.lower(): string To lowercase title() string.title(): string To Title Case trim() string.trim(): string Remove whitespace replace() string.replace(pattern, replacement): string Replace pattern repeat() string.repeat(count): string Repeat string reverse() string.reverse(): string Reverse string slice() string.slice(start, end?): string Substring split() string.split(separator, n?): list Split to list Number Functions Function Signature Description abs() number.abs(): number Absolute value ceil() number.ceil(): number Round up floor() number.floor(): number Round down round() number.round(digits?): number Round to digits toFixed() number.toFixed(precision): string Fixed point notation isEmpty() number.isEmpty(): boolean Not present List Functions Field: list.length Function Signature Description contains() list.contains(value): boolean Element exists containsAll() list.containsAll(...values): boolean All elements exist containsAny() list.containsAny(...values): boolean Any element exists filter() list.filter(expression): list Filter by condition (uses value , index ) map() list.map(expression): list Transform elements (uses value , index ) reduce() list.reduce(expression, initial): any Reduce to single value (uses value , index , acc ) flat() list.flat(): list Flatten nested lists join() list.join(separator): string Join to string reverse() list.reverse(): list Reverse order slice() list.slice(start, end?): list Sublist sort() list.sort(): list Sort ascending unique() list.unique(): list Remove duplicates isEmpty() list.isEmpty(): boolean No elements File Functions Function Signature Description asLink() file.asLink(display?): Link Convert to link hasLink() file.hasLink(otherFile): boolean Has link to file hasTag() file.hasTag(...tags): boolean Has any of the tags hasProperty() file.hasProperty(name): boolean Has property inFolder() file.inFolder(folder): boolean In folder or subfolder Link Functions Function Signature Description asFile() link.asFile(): file Get file object linksTo() link.linksTo(file): boolean Links to file Object Functions Function Signature Description isEmpty() object.isEmpty(): boolean No properties keys() object.keys(): list List of keys values() object.values(): list List of values Regular Expression Functions Function Signature Description matches() regexp.matches(string): boolean Test if matches View Types Table View Cards View List View Map View Requires latitude/longitude properties and the Maps community plugin. Default Summary Formulas Name Input Type Description Average Number Mathematical mean Min Number Smallest number Max Number Largest number Sum Number Sum of all numbers Range Number Max Min Median Number Mathematical median Stddev Number Standard deviation Earliest Date Earliest date Latest Date Latest date Range Date Latest Earliest Checked Boolean Count of true values Unchecked Boolean Count of false values Empty Any Count of empty values Filled Any Count of non empty values Unique Any Count of unique values Complete Examples Task Tracker Base Reading List Base Project Notes Base Daily Notes Index Embedding Bases Embed in Markdown files: YAML Quoting Rules Use single quotes for formulas containing double quotes: 'if(done, "Yes", "No")' Use double quotes for simple strings: "My View Name" Escape nested quotes properly in complex expressions Common Patterns Filter by Tag Filter by Folder Filter by Date Range Filter by Property Value Combine Multiple Conditions References [Bases Syntax](https://help.obsidian.md/bases/syntax) [Functions](https://help.obsidian.md/bases/functions) [Views](https://help.obsidian.md/bases/views) [Formulas](https://help.obsidian.md/formulas)

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