Prerequisites often have an "OR" and/or "AND". Need to addreess course prerequisite use cases that include an "OR" and/or "AND"

[jeannekitchens]

See the Ivy Tech Community College Course Catalog. There are numerous examples of prerequisites with "ORs" and/or "ANDS"
https://catalog.ivytech.edu/content.php?catoid=7&navoid=771,

ACCT 101 - Financial Accounting
PREREQUISITES: Demonstrated competency through appropriate assessment or earning a grade of “C” or better in ENGL 093 - Introduction to College Writing and ENGL 083 - Reading Strategies for College, or ENGL 095 - Integrated Reading and Writing, or ENGL 075 - Co-Requisite Integrated Readin, and MATH 023 - Essentials of Algebra or MATH 080 - Mathematical Principles.
PROGRAM: Accounting
CREDIT HOURS MIN: 3
LECTURE HOURS MIN: 3
DATE OF LAST REVISION: Summer, 2020

[philbarker]

ceterms:requires and a ConditionProfile or two might be the answer. This isn't a simple relationship between two courses, which is what we are currently reserving ceterms:prerequisite for.

PS: I could be persuaded to use ceterms:prerequisite for complex course-to-course relationships, but the mentions of competency and assessment and grade suggest there is more going on here.

(Ideally I would like us to clean up the whole requirements area, but that would involve breaking changes.)

[siuc-nate]

This seems like the kind of thing we built pathways for, particularly with regard to constraints akin to "earning a grade of C or better". It could be done with a set of Condition Profiles and the ceterms:alternativeCondition property, but a Pathway would probably be cleaner in the end.

[philbarker]

This seems like the kind of thing we built pathways for,...

Yep, I thought that too, but there isn't really a pathway here. And it's part of what would be nice to clean up about requirements: the conditions in pathways can just be plain requirements too.

[siuc-nate]

I'm having some difficulty parsing the grammar of the ands/ors in the paragraph. Does this seem right?:

(
	(
		ENGL 093 - Introduction to College Writing 
		AND 
		ENGL 083 - Reading Strategies for College
	)
	OR
	(ENGL 095 - Integrated Reading and Writing)
	OR
	(ENGL 075 - Co-Requisite Integrated Readin)
)
AND
(
	MATH 023 - Essentials of Algebra 
	OR 
	MATH 080 - Mathematical Principles
)

In other words, you:

• must complete either MATH 023 or MATH 080
• must complete one of the following bullets:
  • ENGL 095
  • ENGL 075
  • ENGL 093 and ENGL 083

[siuc-nate]

It's unclear as to whether the credit/lecture hours are part of the prerequisites (and whether or not they'd still be required if a person "demonstrated competency through appropriate assessment"), but the data would look something like this (pretend there are bnodes/published data for each of the concepts and courses):

{
  "@type": "ceterms:Course",
  "ceterms:prerequisite": [
    {
      "@type": "ceterms:ConditionProfile",
      "ceterms:creditValue": [
        {
          "@type": "ceterms:ValueProfile",
          "schema:minValue": 3,
          "ceterms:creditUnitType": [
            "_:CreditHour"
          ]
        },
        {
          "@type": "ceterms:ValueProfile",
          "schema:minValue": 3,
          "ceterms:creditUnitType": [
            "_:LectureHour"
          ]
        }
      ]
    },
    {
      "@type": "ceterms:ConditionProfile",
      "ceterms:alternativeCondition": [
        {
          "@type": "ceterms:ConditionProfile",
          "ceterms:alternativeCondition": [
            {
              "@type": "ceterms:ConditionProfile",
              "ceterms:description": { "en": "Demonstrated competency through appropriate assessment" }
            },
            {
              "@type": "ceterms:ConditionProfile",
              "ceterms:description": { "en": "Earned a grade of C or better in the Course." },
              "ceterms:targetLearningOpportunity": [ "_:MATH023" ]
            },
            {
              "@type": "ceterms:ConditionProfile",
              "ceterms:description": { "en": "Earned a grade of C or better in the Course." },
              "ceterms:targetLearningOpportunity": [ "_:MATH080" ]
            }
          ]
        }
      ]
    },
    {
      "@type": "ceterms:ConditionProfile",
      "ceterms:alternativeCondition": [
        {
          "@type": "ceterms:ConditionProfile",
          "ceterms:alternativeCondition": [
            {
              "@type": "ceterms:ConditionProfile",
              "ceterms:description": { "en": "Demonstrated competency through appropriate assessment" }
            },
            {
              "@type": "ceterms:ConditionProfile",
              "ceterms:description": { "en": "Earned a grade of C or better in the Course." },
              "ceterms:targetLearningOpportunity": [ "_:ENGL095" ]
            },
            {
              "@type": "ceterms:ConditionProfile",
              "ceterms:description": { "en": "Earned a grade of C or better in the Course." },
              "ceterms:targetLearningOpportunity": [ "_:ENGL075" ]
            },
            {
              "@type": "ceterms:ConditionProfile",
              "ceterms:description": { "en": "Earned a grade of C or better in the Courses." },
              "ceterms:targetLearningOpportunity": [ "_:ENGL093", "_:ENGL083" ]
            }
          ]
        }
      ]
    }
  ]
}

[siuc-nate]

See #848 and #947