Outdated Links on the Using Metaschema Page

[aj-stein-nist]

Describe the bug

The "Using Metaschema" page points to old versions of code in @david-waltermire-nist's Metaschema fork, not the official one, and some of the other links are no longer valid with updates to the Metaschema repo directory structure.

• https://github.com/usnistgov/metaschema/schema/
• https://github.com/david-waltermire-nist/metaschema/blob/master/toolchains/oscal-m2/lib/metaschema-check.sch

Who is the bug affecting?

Consumers of Metaschema documentation.

What is affected by this bug?

Proper references to relevant code or technical documentation for specific points on this page (or other pages).

When does this occur?

Consistently

How do we replicate the issue?

1. Visit the page in the description and review all hyperlinks.

Expected behavior (i.e. solution)

Hyperlinks point to current code and technical documentation.

Other Comments

N/A