Closes #80 Align core attribute documentation with ADaM IG 1.3 and SDTM standards

[Copilot]

The documentation incorrectly listed "Expected" and "Conditionally Expected" as valid ADaM core values. Per ADaM IG 1.3 pg 14, ADaM only uses: Required, Conditionally Required, and Permissible.

Changes

• README.Rmd/README.md: Updated core attribute description in ds_vars table to specify:
  • ADaM IG 1.3: "Required", "Conditionally Required", "Permissible"
  • SDTM: "Required", "Expected", "Permissible"
• Building_Specification_Readers.Rmd: Added standard-specific core values

Scope

Validation logic in R/validators.R unchanged to avoid breaking existing metadata that may use the broader set of values.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Documentation: core in Readme</issue_title>
<issue_description>

In ADaM IG, core can be Required, Conditionally required or Permissible (ADAM IG 1.3 pg 14)

SDTM IG 3.4 page 22

It is not clear what core values are allowed. Furthermore, in CDISC library, only Req, Cond Perm is used for ADaM and SDTM Req, Exp and Perm. Are these values also acceptable for Core?</issue_description>

<agent_instructions>I need to update the information in the Readme to be more aligned with ADaM IG screenshot provided in the issue</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Documentation: core in Readme #80

---

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[bms63]

I asked copilot to do this - trying to figure out how to prompt things better!! seems like it got all the relevant points just from the issue!!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.44%. Comparing base (197b67f) to head (ec304aa).
⚠️ Report is 6 commits behind head on 80-documentation-core-in-readme.

Additional details and impacted files

@@                       Coverage Diff                        @@
##           80-documentation-core-in-readme     #127   +/-   ##
================================================================
  Coverage                            85.44%   85.44%           
================================================================
  Files                                    8        8           
  Lines                                 1175     1175           
================================================================
  Hits                                  1004     1004           
  Misses                                 171      171           

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[cpiraux]

Thanks for this update! I have one small comment; the rest looks good to me!

[bms63]

@LiamHobby and @cpiraux all good?

[LiamHobby]

Looks good. Thanks Ben!