Repetition and Lists

Repeating Matchers

Use {min,max} syntax after a matcher to specify repetition constraints:

Unbounded Repetition

Use {,} to allow unlimited repetitions:

schema.mds

`item:/\w+/`{,}

input.md

one

Output:

{"item":"one"}

schema.mds

`item:/\w+/`{,}

input.md

one two three four five

Output:

{"item":"one two three four five"}

Exact Count

schema.mds

`digit:/\d/`{3,3}

input.md

123

Output:

{"digit":"123"}

schema.mds

`digit:/\d/`{3,3}

input.md

12

Range Constraints

schema.mds

`num:/\d+/`{2,4}

input.md

12 34

Output:

{"num":"12 34"}

schema.mds

`num:/\d+/`{2,4}

input.md

12

Lists

Lists validate structured list content with support for literal items, matchers, and repetition.

Basic List Matching

schema.mds

- Item 1
- Item 2

input.md

- Item 1
- Item 2

schema.mds

- Item 1
- Item 2

input.md

- Item 1
- Item 3

List Items with Matchers

schema.mds

- `name:/\w+/`
- `age:/\d+/`

input.md

- Alice
- 25

Output:

{"name":"Alice","age":"25"}

Repeated List Items

Use {min,max} on list item matchers to match multiple items:

schema.mds

- `item:/\w+/`{2,4}

input.md

- apple
- banana

Output:

{"item":["apple","banana"]}

schema.mds

- `item:/\w+/`{2,4}

input.md

- apple

schema.mds

- `task:/\w+/`{,}

input.md

- work
- study
- exercise

Output:

{"task":["work","study","exercise"]}

Nested Lists

schema.mds

- Parent
  - `child:/\w+/`{1,2}

input.md

- Parent
  - child1
  - child2

Output:

{"child":["child1","child2"]}

schema.mds

- Parent
  - Child

input.md

- Parent
- Child

Multiple Matchers in Sequence

schema.mds

- `first:/test\d/`{2,2}
- `second:/foo\d/`{1,2}

input.md

- test1
- test2
- foo1

Output:

{"first":["test1","test2"],"second":["foo1"]}

Notes

• List matchers return arrays when repeated
• Variable-length matchers must be at the end of a list schema
• Indentation levels must match for nested lists