# Core

> Parameter types every pack can use.

Source: https://axx.nimbusxr.us/next/references/packs/core/

Parameter types every pack can use.

Every project has it, and every pack builds on it.

## Parameter types

| Parameter | Takes | Values | For example |
|---|---|---|---|
| `{duration}` | a duration in seconds (`s`) or minutes (`m`) |  | `5s`, `2m` |
| `{filepath}` | a file of the project: a path relative to the feature file's directory, the `resources` directories or axx.yaml's directory (looked for in that order), or an absolute path, quoted when it has a space |  | `seeds/parcels.yaml`, `kafka/scan-delivered.json`, `"seeds/day one.yaml"` |
| `{mimeType}` | a content type | `application/json`, `text/json`, `application/problem+json`, `application/x-www-form-urlencoded` | `application/json` |
| `{ordinal}` | a position, counting from 1; an optional ordinal left out is the first |  | `1st`, `2nd`, `3rd` |
| `{path}` | a path in a folder or a store, like `manifests/M-1/report.csv`, quoted when it has a space. A `*` stands for any characters but a slash, for a name a check cannot know (`snap-*.json`, named by the time): the path then names the one file it matches |  | `manifests/M-KESTREL-0412/report.csv`, `"Parcels/Depot desk/arrivals.json"`, `snap-*.json` |
| `{pattern}` | a regular expression (Java syntax) with no spaces, which matches the whole value |  | `PX-\d{4}`, `[A-Z]{2}-\d+` |