Entity Medical Treatment Authorization Fact

DescriptionAn approval that a healthcare practitioner receives from a health plan organization for a patient to receive treatment.

Attributes
Authorization Effective Calendar DkAuthorization Effective Calendar Dk
Authorization Effective DtAuthorization Effective Dt
Authorization Expiration Calendar DkAuthorization Expiration Calendar Dk
Authorization Expiration DtAuthorization Expiration Dt
Authorization IdAuthorization Id
Authorized Number Of TreatmentsAuthorized Number Of Treatments
Authorized Procedure CdAuthorized Procedure Cd
Authorized Procedure Code DkAuthorized Procedure Code Dk
Authorized Procedure Code SkAuthorized Procedure Code Sk
AWM Load Info SkAWM Load Info Sk
Currency CdCurrency Cd
Currency Code SkCurrency Code Sk
Current IndCurrent Ind
DWM Load Info SkDWM Load Info Sk
Effective From DtEffective From Dt
Effective To DtEffective To Dt
Encounter DkEncounter Dk
Encounter SkEncounter Sk
Healthcare Insurer DkHealthcare Insurer Dk
Healthcare Insurer SkHealthcare Insurer Sk
Insurance Plan NumInsurance Plan Num
Medical Treatment Authorization BkMedical Treatment Authorization Bk
Medical Treatment Authorization DkMedical Treatment Authorization Dk
Medical Treatment Authorization SkMedical Treatment Authorization Sk
Origination Calendar DkOrigination Calendar Dk
Origination DtOrigination Dt
Patient DkPatient Dk
Patient SkPatient Sk
Performed Calendar DkPerformed Calendar Dk
Performed DtPerformed Dt
Performing Encounter DkPerforming Encounter Dk
Performing Encounter SkPerforming Encounter Sk
Performing Practitioner DkPerforming Practitioner Dk
Performing Practitioner SkPerforming Practitioner Sk
Performing Provider DkPerforming Provider Dk
Performing Provider SkPerforming Provider Sk
Reimbursement Limit AmtReimbursement Limit Amt
Requested Number Of TreatmentsRequested Number Of Treatments
Source CdSource Cd
Source Code SkSource Code Sk
Tenant SkTenant Sk
Type CdType Cd
Type Code SkType Code Sk
Valid From TsValid From Ts
Valid To TsValid To Ts

Relationship
Medical Treatment Authorization_Patient_FKMedical Treatment Authorization_Patient_FK
Medical Treatment Authorization_Healthcare Insurer_FKMedical Treatment Authorization_Healthcare Insurer_FK
Medical Treatment Authorization_Provider_FK1Medical Treatment Authorization_Provider_FK1
Medical Treatment Authorization_Procedure Code_FK1Medical Treatment Authorization_Procedure Code_FK1
Medical Treatment Authorization_Calendar_FKMedical Treatment Authorization_Calendar_FK
Medical Treatment Authorization Fact_Calendar Dimension_FKMedical Treatment Authorization Fact_Calendar Dimension_FK
Medical Treatment Authorization Fact_Calendar Dimension_FK2Medical Treatment Authorization Fact_Calendar Dimension_FK2
Medical Treatment Authorization Fact_Practitioner Dimension_FKMedical Treatment Authorization Fact_Practitioner Dimension_FK
Medical Treatment Authorization Fact_Calendar Dimension_FK1Medical Treatment Authorization Fact_Calendar Dimension_FK1
Medical Treatment Authorization Fact_Encounter Dimension_FKMedical Treatment Authorization Fact_Encounter Dimension_FK
Medical Treatment Authorization Fact_Encounter Dimension_FK1Medical Treatment Authorization Fact_Encounter Dimension_FK1

Primary Key
Medical Treatment Authorization Fact PKMedical Treatment Authorization Fact PK

Dependencies
 
 

Reverse Dependencies
 

Attribute Details

 Authorization Effective Calendar Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Authorization Effective Dt
DescriptionThe effective date upon which the authorized treatment can begin which is covered and issued by the insurer.
Data TypeStandards - Data Domains.ddm/Data Domains/Date [DATE]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Authorization Expiration Calendar Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Authorization Expiration Dt
DescriptionThe expiration date upon which the authorized treatment will no longer be covered by the insurer.



Data TypeStandards - Data Domains.ddm/Data Domains/Date [DATE]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Authorization Id
DescriptionThe coverage application's permanent identifier assigned to track the authorization and all related billing documents.
Data TypeStandards - Data Domains.ddm/Data Domains/Alphanumeric [VARCHAR(80)]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Authorized Number Of Treatments
DescriptionThe number of times that the authorized treatment may be administered to the patient without obtaining additional authorization.
Data TypeStandards - Data Domains.ddm/Data Domains/Number Integer [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Authorized Procedure Cd
DescriptionA unique code that identifies a procedure within a coding system. Standard procedure code sets include Current Procedural Terminology (CPT), SNOMED and Healthcare Common and Universal Billing (UB) Revenue codes.
Data TypeStandards - Data Domains.ddm/Data Domains/Tenant Common Code [VARCHAR(80)]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Authorized Procedure Code Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Authorized Procedure Code Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the Atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 AWM Load Info Sk
DescriptionThe surrogate key of the load information entry describing the details regarding the loading of the row in the atomic data warehouse.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Currency Cd
DescriptionIndicates the currency used as the basis for all monetary amounts.
Data TypeStandards - Data Domains.ddm/Data Domains/Tenant Common Code [VARCHAR(80)]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Currency Code Sk
DescriptionIndicates the currency used as the basis for all monetary amounts.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Current Ind
DescriptionSet to 'Y' if this is the most recent row of a group having the same Surrogate Key.
Data TypeStandards - Data Domains.ddm/Data Domains/Boolean Indicator [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 DWM Load Info Sk
DescriptionThe surrogate key of the load information entry describing the details regarding the loading of the row.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Effective From Dt
DescriptionEstablishes a period where a set of attributes are true according to the business.
Data TypeStandards - Data Domains.ddm/Data Domains/Date [DATE]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Effective To Dt
DescriptionEnds a period of effectivity.
Data TypeStandards - Data Domains.ddm/Data Domains/Date [DATE]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Encounter Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Encounter Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Healthcare Insurer Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Healthcare Insurer Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Insurance Plan Num
DescriptionThe ID of the coverage plan authorizing treatment.
Data TypeStandards - Data Domains.ddm/Data Domains/Alphanumeric [VARCHAR(80)]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Medical Treatment Authorization Bk
DescriptionConcatenated values of a set of business attributes that uniquely identify the row.
Data TypeStandards - Data Domains.ddm/Data Domains/Business Key [VARCHAR(255)]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Medical Treatment Authorization Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeytrue
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keytrue



 Medical Treatment Authorization Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Origination Calendar Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Origination Dt
DescriptionThe date upon which the authorization originated with the authorizing party.
Data TypeStandards - Data Domains.ddm/Data Domains/Date [DATE]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Patient Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Patient Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performed Calendar Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performed Dt
DescriptionThe date on which the Procedure for which the patient was authorized or referred was performed or commenced.
Data TypeStandards - Data Domains.ddm/Data Domains/Date [DATE]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performing Encounter Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performing Encounter Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performing Practitioner Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performing Practitioner Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performing Provider Dk
DescriptionA numeric surrogate key used to uniquely identify entities in the dimensional model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Performing Provider Sk
DescriptionA numeric surrogate key used to uniquely identify entities in the atomic model.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key Large [LONG]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Reimbursement Limit Amt
DescriptionThe dollar limit for reimbursement specified by the coverage plan for the authorized treatment.
Data TypeStandards - Data Domains.ddm/Data Domains/Currency Amount [DECIMAL(14,2)]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Requested Number Of Treatments
DescriptionThe requested number of times that the treatment may be administered to the patient without obtaining additional authorization.
Data TypeStandards - Data Domains.ddm/Data Domains/Number Integer [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse



 Source Cd
DescriptionThe code that corresponds to the Source Code Sk.
Data TypeStandards - Data Domains.ddm/Data Domains/Tenant Common Code [VARCHAR(80)]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Source Code Sk
DescriptionThe origin of the data identifying the actual load source, vendor, manual key entry, or context of the data in a specific row in the database.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Tenant Sk
DescriptionThe surrogate key of the entry identifying the legal owner of the data.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Type Cd
DescriptionUnique coded value for kind of Medical Treatment Authorization.
Data TypeStandards - Data Domains.ddm/Data Domains/Tenant Common Code [VARCHAR(80)]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Type Code Sk
DescriptionUnique coded value for kind of Medical Treatment Authorization.
Data TypeStandards - Data Domains.ddm/Data Domains/Surrogate Key [INTEGER]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Valid From Ts
DescriptionEstablishes a period where a set of attributes are true in the source system. This would be populated with the transaction timestamp and would be used for the snapshot date.
Data TypeStandards - Data Domains.ddm/Data Domains/Timestamp [TIMESTAMP]
Is Part Of PrimaryKeyfalse
Is Requiredtrue
Is Derivedfalse
Is Surrogate Keyfalse



 Valid To Ts
DescriptionEnds a period of validity.
Data TypeStandards - Data Domains.ddm/Data Domains/Timestamp [TIMESTAMP]
Is Part Of PrimaryKeyfalse
Is Requiredfalse
Is Derivedfalse
Is Surrogate Keyfalse

Relationship Details

 Medical Treatment Authorization_Patient_FK
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TablePatient Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization_Healthcare Insurer_FK
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableHealthcare Insurer Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization_Provider_FK1
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameperforming
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableProvider Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization_Procedure Code_FK1
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameauthorized
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableProcedure Code Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization_Calendar_FK
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameeffective
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableCalendar Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization Fact_Calendar Dimension_FK
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameexpiration
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableCalendar Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization Fact_Calendar Dimension_FK2
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameorigination
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableCalendar Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization Fact_Practitioner Dimension_FK
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameperforming
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TablePractitioner Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization Fact_Calendar Dimension_FK1
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameperformed
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableCalendar Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization Fact_Encounter Dimension_FK
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableEncounter Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE



 Medical Treatment Authorization Fact_Encounter Dimension_FK1
Is Identifying Relationshipfalse
Child TableMedical Treatment Authorization Fact
Child Role Nameperforming
Child MultiplicityZERO_TO_MANY
Child Referential Integrity: On DeleteNONE
Child Referential Integrity: On InsertNONE
Child Referential Integrity: On UpdateNONE
Parent TableEncounter Dimension
Parent MultiplicityONE
Parent Referential Integrity: On DeleteNONE
Parent Referential Integrity: On InsertNONE
Parent Referential Integrity: On UpdateNONE

Primary Key Details

 Medical Treatment Authorization Fact PK
Key AttributeMedical Treatment Authorization Dk