List of pending changes that we want to have in 2.0.0 before releasing it:

• Field validator should check for ECS fields marked as arrays elastic-package#615
  • Validate expected fields normalization elastic-package#765
• [field validation] Check event.type values are aligned with event.category elastic-package#837
  • Validate that event.type is aligned with event.category elastic-package#961
• Add new lint/check to ensure event.dataset is set correctly #217
  • Validate the proper value of event.dataset elastic-package#968
• [Change Proposal] Properly support or remove the array field type #408
  • Remove "array" as field data type #412
• Add field validation for ilm_policy field in package spec. #92
• [Change Proposal] Stricter validation on fields properties #282
  • Stricter validation of field definitions #420

Postponed

• Validate fields skipped in type assertion elastic-package#147
  It should be built upon [Discuss] Elastic Packages: Introduce schema for data providers #199, and it won't be so breaking in that case.
• Validate dataset and namespace #57
  There are also checks in Kibana, if some package is broken now it cannot be used. We can add validations here in a next version.

Related:

• Document guidelines for upgrading to package spec 2.0.0 elastic-package#963
  • Add howto about migrating a package to package spec v2 elastic-package#964
  • Add docs about how to migrate out from the array type elastic-package#974