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Relationships : (Hydrology/DesignPoints)

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  "id": 0,
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  "catalogID": "{E4B614CB-B646-4864-AA93-C0CC3F3DB62F}",
  "backwardPathLabel": "hydro_design_point",
  "originLayerId": 0,
  "originPrimaryKey": "hydro_design_point_id",
  "forwardPathLabel": "hydro_peak_flow",
  "destinationLayerId": 1,
  "originForeignKey": "hydro_design_point_id",
  "rules": [],
  "cardinality": "esriRelCardinalityOneToMany",
  "attributed": false,
  "composite": false
 },
 {
  "id": 1,
  "name": "hydro_design_point_hydro_runoff_volume",
  "catalogID": "{9AC7912D-09B1-430E-9DF4-D3AD535A1C0D}",
  "backwardPathLabel": "hydro_design_point",
  "originLayerId": 0,
  "originPrimaryKey": "hydro_design_point_id",
  "forwardPathLabel": "hydro_runoff_volume",
  "destinationLayerId": 2,
  "originForeignKey": "hydro_design_point_id",
  "rules": [],
  "cardinality": "esriRelCardinalityOneToMany",
  "attributed": false,
  "composite": false
 }
]}