# `JSV.Resolver.Internal`
[🔗](https://github.com/lud/jsv/blob/v0.21.2/lib/jsv/resolver/internal.ex#L1)

A `JSV.Resolver` implementation that resolves URIs pointing to the application
code base or JSV code base.

A custom resolver implementation should delegate `jsv:` prefixed URIs to this
module to enable support of the internal resolutions features.

### Module based schemas

This resolver will resolve `jsv:module:MODULE` URIs where `MODULE` is a string
representation of an Elixir module. Modules pointed at with such references
MUST export a `json_schema/0` function that returns a normalized JSON schema
with binary keys and values.

### Security considerations

This resolver is always included in the resolver chain used by `JSV.build/2`,
so any schema, including a schema obtained from external input, can contain a
`jsv:module:` reference. Resolving such a reference calls `json_schema/0` on
the target module.

The reachable surface is narrow: only modules already known by the runtime
can be referenced, the invoked function name and arity are fixed, and errors
raised during resolution are returned as build errors. Keep `json_schema/0`
implementations pure, building and returning the schema data, so that
resolving a module reference stays free of side effects.

# `module_to_uri`

```elixir
@spec module_to_uri(module()) :: binary()
```

Returns a JSV internal URI for the given module.

### Example

    iex> module_to_uri(Inspect.Opts)
    "jsv:module:Elixir.Inspect.Opts"

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*Consult [api-reference.md](api-reference.md) for complete listing*