Transforming user query by applying 1 rule maps.
User query disjoint 
{
  {
    ?patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?middleName .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dob .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?sex .
    ?b0x8109a10_gen3 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
    ?b0x8109e58_gen0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?takes .
    ?b0x810a530_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 6809  .
    ?b0x8109e58_gen0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> ?b0x810a530_gen1 .
    ?b0x8109a10_gen3 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> ?b0x8109e58_gen0 .
    ?b0x810a630_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?hlsd_start_gen2 .
    ?b0x8109a10_gen3 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> ?b0x810a630_gen4 .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> ?b0x8109a10_gen3 .
  }
  {
    ?patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?middleName .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dob .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?sex .
    ?b0x8109a10_gen4 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
    ?b0x8109e58_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?contra .
    ?b0x810a530_gen2 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 11289  .
    ?b0x8109e58_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> ?b0x810a530_gen2 .
    ?b0x8109a10_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> ?b0x8109e58_gen1 .
    ?b0x810a630_gen5 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?hlsd_start_gen3 .
    ?b0x8109a10_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> ?b0x810a630_gen5 .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> ?b0x8109a10_gen4 .
  }
  {
    FILTER ( !bound(?contra))
  }
}

matched against rule head (expressed as a pattern)
WHERE
{
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?dbhl_middleName .
  }
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dbhl_dob .
  }
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?dbhl_sex .
  }
  optional {
      ?dbhl_person <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
  }
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> _:b0x8109a78 .
  }
  optional {
      _:b0x8109a78 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> _:b0x8109bc0 .
  }
  optional {
      _:b0x8109a78 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
  }
  optional {
      _:b0x8109a78 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> _:b0x8109db8 .
  }
  optional {
      _:b0x8109bc0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?dbhl_takes .
  }
  optional {
      _:b0x8109bc0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> _:b0x8109f08 .
  }
  optional {
      _:b0x8109f08 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> ?dbhl_ingred .
  }
  optional {
      _:b0x8109db8 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?dbhl_indicDate .
  }
}

produced result set
┌───────────┬──────────────┬──────────────────┬───────────┬─────────────┬──────────────────┬──────────────┬──────────────────┬──────────────────┬──────────────────┬──────────────────┐
│ ?dbhl_dob │ ?dbhl_person │ ?dbhl_middleName │ ?dbhl_sex │ ?dbhl_takes │ ?dbhl_indicDate  │ ?dbhl_ingred │ _:b0x8109f08     │ _:b0x8109bc0     │ _:b0x8109a78     │ _:b0x8109db8     │
│      ?dob │     ?patient │      ?middleName │      ?sex │      ?takes │ ?hlsd_start_gen2 │         6809 │ ?b0x810a530_gen1 │ ?b0x8109e58_gen0 │ ?b0x8109a10_gen3 │ ?b0x810a630_gen4 │
│      ?dob │     ?patient │      ?middleName │      ?sex │     ?contra │ ?hlsd_start_gen3 │        11289 │ ?b0x810a530_gen2 │ ?b0x8109e58_gen1 │ ?b0x8109a10_gen4 │ ?b0x810a630_gen5 │
└───────────┴──────────────┴──────────────────┴───────────┴─────────────┴──────────────────┴──────────────┴──────────────────┴──────────────────┴──────────────────┴──────────────────┘

yielding transformed query disjoint:
{
  {
    ?patient <http://hospital.example/DB/Person#MiddleName> ?middleName .
    ?patient <http://hospital.example/DB/Person#DateOfBirth> ?dob .
    ?patient <http://hospital.example/DB/Person#SexDE> ?dbhl_sexEntry_gen1 .
  }
  {
    ?dbhl_sexEntry_gen1 <http://hospital.example/DB/Sex_DE#EntryName> ?sex .
  }
  {
    ?dbhl_indicItem_gen0 <http://hospital.example/DB/Item_Medication#PatientID> ?patient .
    ?dbhl_indicItem_gen0 <http://hospital.example/DB/Item_Medication#PerformedDTTM> ?hlsd_start_gen2 .
    ?dbhl_indicItem_gen0 <http://hospital.example/DB/Item_Medication#EntryName> ?takes .
    ?dbhl_indicMed_gen3 <http://hospital.example/DB/Medication#ItemID> ?dbhl_indicItem_gen0 .
    ?dbhl_indicMed_gen3 <http://hospital.example/DB/Medication#DaysToTake> ?dbhl_indicDuration_gen4 .
    ?dbhl_indicMed_gen3 <http://hospital.example/DB/Medication#MedDictDE> ?dbhl_indicDE_gen5 .
    ?dbhl_indicDE_gen5 <http://hospital.example/DB/Medication_DE#NDC> ?dbhl_indicNDC_gen6 .
  }
  {
    ?dbhl_indicCode_gen2 <http://hospital.example/DB/NDCcodes#NDC> ?dbhl_indicNDC_gen6 .
    ?dbhl_indicCode_gen2 <http://hospital.example/DB/NDCcodes#ingredient> 6809  .
  }
  {
    ?patient <http://hospital.example/DB/Person#MiddleName> ?middleName .
    ?patient <http://hospital.example/DB/Person#DateOfBirth> ?dob .
    ?patient <http://hospital.example/DB/Person#SexDE> ?dbhl_sexEntry_gen2 .
  }
  {
    ?dbhl_sexEntry_gen2 <http://hospital.example/DB/Sex_DE#EntryName> ?sex .
  }
  {
    ?dbhl_indicItem_gen1 <http://hospital.example/DB/Item_Medication#PatientID> ?patient .
    ?dbhl_indicItem_gen1 <http://hospital.example/DB/Item_Medication#PerformedDTTM> ?hlsd_start_gen3 .
    ?dbhl_indicItem_gen1 <http://hospital.example/DB/Item_Medication#EntryName> ?contra .
    ?dbhl_indicMed_gen4 <http://hospital.example/DB/Medication#ItemID> ?dbhl_indicItem_gen1 .
    ?dbhl_indicMed_gen4 <http://hospital.example/DB/Medication#DaysToTake> ?dbhl_indicDuration_gen5 .
    ?dbhl_indicMed_gen4 <http://hospital.example/DB/Medication#MedDictDE> ?dbhl_indicDE_gen6 .
    ?dbhl_indicDE_gen6 <http://hospital.example/DB/Medication_DE#NDC> ?dbhl_indicNDC_gen7 .
  }
  {
    ?dbhl_indicCode_gen3 <http://hospital.example/DB/NDCcodes#NDC> ?dbhl_indicNDC_gen7 .
    ?dbhl_indicCode_gen3 <http://hospital.example/DB/NDCcodes#ingredient> 11289  .
  }
  FILTER ( !bound(?contra))
}

Transforming user query by applying 1 rule maps.
User query disjoint 
{
  {
    ?patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.sdtm.org/vocabulary#Patient> .
    ?patient <http://www.sdtm.org/vocabulary#middleName> ?middleName .
    ?patient <http://www.sdtm.org/vocabulary#dateTimeOfBirth> ?dob .
    ?patient <http://www.sdtm.org/vocabulary#sex> ?sex .
    _:b0x810b8d8 <http://www.sdtm.org/vocabulary#subject> ?patient .
    _:b0x810b8d8 <http://www.sdtm.org/vocabulary#standardizedMedicationName> ?takes .
    _:b0x810b8d8 <http://www.sdtm.org/vocabulary#startDateTimeOfMedication> ?indicDate .
    _:b0x810bc68 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 6809  .
    _:b0x810b8d8 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> _:b0x810bc68 .
  }
  OPTIONAL     {
      _:b0x810bee0 <http://www.sdtm.org/vocabulary#subject> ?patient .
      _:b0x810bee0 <http://www.sdtm.org/vocabulary#standardizedMedicationName> ?contra .
      _:b0x810bee0 <http://www.sdtm.org/vocabulary#startDateTimeOfMedication> ?contraDate .
      _:b0x810c0d8 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 11289  .
      _:b0x810bee0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> _:b0x810c0d8 .
    }
  {
    FILTER ( !bound(?contra))
  }
}

matched against rule head (expressed as a pattern)
WHERE
{
  optional {
      _:p <http://www.sdtm.org/vocabulary#standardizedMedicationName> ?hlsd_takes .
  }
  optional {
      _:p <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.sdtm.org/vocabulary#ConcomitantMedication> .
  }
  optional {
      _:p <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> _:b0x81098e0 .
  }
  optional {
      _:p <http://www.sdtm.org/vocabulary#subject> ?hlsd_patient .
  }
  optional {
      _:b0x81098e0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> ?hlsd_ingred .
  }
  optional {
      ?hlsd_patient <http://www.sdtm.org/vocabulary#middleName> ?hlsd_middleName .
  }
  optional {
      ?hlsd_patient <http://www.sdtm.org/vocabulary#dateTimeOfBirth> ?hlsd_dob .
  }
  optional {
      ?hlsd_patient <http://www.sdtm.org/vocabulary#sex> ?hlsd_sex .
  }
  optional {
      ?hlsd_patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.sdtm.org/vocabulary#Patient> .
  }
}

produced result set
┌───────────┬──────────────────┬───────────────┬───────────┬──────────────┬─────────────┬──────────────┬──────────────┐
│ ?hlsd_dob │ ?hlsd_middleName │ ?hlsd_patient │ ?hlsd_sex │ _:p          │ ?hlsd_takes │ ?hlsd_ingred │ _:b0x81098e0 │
│      ?dob │      ?middleName │      ?patient │      ?sex │ _:b0x810b8d8 │      ?takes │         6809 │ _:b0x810bc68 │
│      ?dob │      ?middleName │      ?patient │      ?sex │ _:b0x810bee0 │     ?contra │        11289 │ _:b0x810c0d8 │
└───────────┴──────────────────┴───────────────┴───────────┴──────────────┴─────────────┴──────────────┴──────────────┘

yielding transformed query disjoint:
{
  {
    ?patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?middleName .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dob .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?sex .
    ?b0x8109a10_gen3 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
    ?b0x8109e58_gen0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?takes .
    ?b0x810a530_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 6809  .
    ?b0x8109e58_gen0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> ?b0x810a530_gen1 .
    ?b0x8109a10_gen3 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> ?b0x8109e58_gen0 .
    ?b0x810a630_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?hlsd_start_gen2 .
    ?b0x8109a10_gen3 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> ?b0x810a630_gen4 .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> ?b0x8109a10_gen3 .
  }
  {
    ?patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?middleName .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dob .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?sex .
    ?b0x8109a10_gen4 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
    ?b0x8109e58_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?contra .
    ?b0x810a530_gen2 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 11289  .
    ?b0x8109e58_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> ?b0x810a530_gen2 .
    ?b0x8109a10_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> ?b0x8109e58_gen1 .
    ?b0x810a630_gen5 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?hlsd_start_gen3 .
    ?b0x8109a10_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> ?b0x810a630_gen5 .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> ?b0x8109a10_gen4 .
  }
  FILTER ( !bound(?contra))
}

Transforming user query by applying 1 rule maps.
User query disjoint 
{
  {
    ?patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?middleName .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dob .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?sex .
    ?b0x8109a10_gen3 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
    ?b0x8109e58_gen0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?takes .
    ?b0x810a530_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 6809  .
    ?b0x8109e58_gen0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> ?b0x810a530_gen1 .
    ?b0x8109a10_gen3 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> ?b0x8109e58_gen0 .
    ?b0x810a630_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?hlsd_start_gen2 .
    ?b0x8109a10_gen3 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> ?b0x810a630_gen4 .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> ?b0x8109a10_gen3 .
  }
  {
    ?patient <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?middleName .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dob .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?sex .
    ?b0x8109a10_gen4 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
    ?b0x8109e58_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?contra .
    ?b0x810a530_gen2 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> 11289  .
    ?b0x8109e58_gen1 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> ?b0x810a530_gen2 .
    ?b0x8109a10_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> ?b0x8109e58_gen1 .
    ?b0x810a630_gen5 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?hlsd_start_gen3 .
    ?b0x8109a10_gen4 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> ?b0x810a630_gen5 .
    ?patient <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> ?b0x8109a10_gen4 .
  }
  {
    FILTER ( !bound(?contra))
  }
}

matched against rule head (expressed as a pattern)
WHERE
{
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#entityName> ?dbhl_middleName .
  }
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#livingSubjectBirthTime> ?dbhl_dob .
  }
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#administrativeGenderCodePrintName> ?dbhl_sex .
  }
  optional {
      ?dbhl_person <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#Person> .
  }
  optional {
      ?dbhl_person <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#substanceAdministration> _:b0x8109a78 .
  }
  optional {
      _:b0x8109a78 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#consumable> _:b0x8109bc0 .
  }
  optional {
      _:b0x8109a78 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#SubstanceAdministration> .
  }
  optional {
      _:b0x8109a78 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#effectiveTime> _:b0x8109db8 .
  }
  optional {
      _:b0x8109bc0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#displayName> ?dbhl_takes .
  }
  optional {
      _:b0x8109bc0 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#activeIngredient> _:b0x8109f08 .
  }
  optional {
      _:b0x8109f08 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#classCode> ?dbhl_ingred .
  }
  optional {
      _:b0x8109db8 <http://www.hl7.org/v3ballot/xml/infrastructure/vocabulary/vocabulary#start> ?dbhl_indicDate .
  }
}

produced result set
┌───────────┬──────────────┬──────────────────┬───────────┬─────────────┬──────────────────┬──────────────┬──────────────────┬──────────────────┬──────────────────┬──────────────────┐
│ ?dbhl_dob │ ?dbhl_person │ ?dbhl_middleName │ ?dbhl_sex │ ?dbhl_takes │ ?dbhl_indicDate  │ ?dbhl_ingred │ _:b0x8109f08     │ _:b0x8109bc0     │ _:b0x8109a78     │ _:b0x8109db8     │
│      ?dob │     ?patient │      ?middleName │      ?sex │      ?takes │ ?hlsd_start_gen2 │         6809 │ ?b0x810a530_gen1 │ ?b0x8109e58_gen0 │ ?b0x8109a10_gen3 │ ?b0x810a630_gen4 │
│      ?dob │     ?patient │      ?middleName │      ?sex │     ?contra │ ?hlsd_start_gen3 │        11289 │ ?b0x810a530_gen2 │ ?b0x8109e58_gen1 │ ?b0x8109a10_gen4 │ ?b0x810a630_gen5 │
└───────────┴──────────────┴──────────────────┴───────────┴─────────────┴──────────────────┴──────────────┴──────────────────┴──────────────────┴──────────────────┴──────────────────┘

yielding transformed query disjoint:
{
  {
    ?patient <http://hospital.example/DB/Person#MiddleName> ?middleName .
    ?patient <http://hospital.example/DB/Person#DateOfBirth> ?dob .
    ?patient <http://hospital.example/DB/Person#SexDE> ?dbhl_sexEntry_gen1 .
  }
  {
    ?dbhl_sexEntry_gen1 <http://hospital.example/DB/Sex_DE#EntryName> ?sex .
  }
  {
    ?dbhl_indicItem_gen0 <http://hospital.example/DB/Item_Medication#PatientID> ?patient .
    ?dbhl_indicItem_gen0 <http://hospital.example/DB/Item_Medication#PerformedDTTM> ?hlsd_start_gen2 .
    ?dbhl_indicItem_gen0 <http://hospital.example/DB/Item_Medication#EntryName> ?takes .
    ?dbhl_indicMed_gen3 <http://hospital.example/DB/Medication#ItemID> ?dbhl_indicItem_gen0 .
    ?dbhl_indicMed_gen3 <http://hospital.example/DB/Medication#DaysToTake> ?dbhl_indicDuration_gen4 .
    ?dbhl_indicMed_gen3 <http://hospital.example/DB/Medication#MedDictDE> ?dbhl_indicDE_gen5 .
    ?dbhl_indicDE_gen5 <http://hospital.example/DB/Medication_DE#NDC> ?dbhl_indicNDC_gen6 .
  }
  {
    ?dbhl_indicCode_gen2 <http://hospital.example/DB/NDCcodes#NDC> ?dbhl_indicNDC_gen6 .
    ?dbhl_indicCode_gen2 <http://hospital.example/DB/NDCcodes#ingredient> 6809  .
  }
  {
    ?patient <http://hospital.example/DB/Person#MiddleName> ?middleName .
    ?patient <http://hospital.example/DB/Person#DateOfBirth> ?dob .
    ?patient <http://hospital.example/DB/Person#SexDE> ?dbhl_sexEntry_gen2 .
  }
  {
    ?dbhl_sexEntry_gen2 <http://hospital.example/DB/Sex_DE#EntryName> ?sex .
  }
  {
    ?dbhl_indicItem_gen1 <http://hospital.example/DB/Item_Medication#PatientID> ?patient .
    ?dbhl_indicItem_gen1 <http://hospital.example/DB/Item_Medication#PerformedDTTM> ?hlsd_start_gen3 .
    ?dbhl_indicItem_gen1 <http://hospital.example/DB/Item_Medication#EntryName> ?contra .
    ?dbhl_indicMed_gen4 <http://hospital.example/DB/Medication#ItemID> ?dbhl_indicItem_gen1 .
    ?dbhl_indicMed_gen4 <http://hospital.example/DB/Medication#DaysToTake> ?dbhl_indicDuration_gen5 .
    ?dbhl_indicMed_gen4 <http://hospital.example/DB/Medication#MedDictDE> ?dbhl_indicDE_gen6 .
    ?dbhl_indicDE_gen6 <http://hospital.example/DB/Medication_DE#NDC> ?dbhl_indicNDC_gen7 .
  }
  {
    ?dbhl_indicCode_gen3 <http://hospital.example/DB/NDCcodes#NDC> ?dbhl_indicNDC_gen7 .
    ?dbhl_indicCode_gen3 <http://hospital.example/DB/NDCcodes#ingredient> 11289  .
  }
  FILTER ( !bound(?contra))
}