{
  "id": "skill-area:columnar-storage",
  "_kind": "SkillArea",
  "_file": "domain/skill-areas/skill-areas-data-eng.yaml",
  "_cluster": "domain",
  "attributes": {
    "displayName": "Columnar Storage Formats",
    "description": "Working with Parquet, ORC, Arrow — encoding/compression,\npredicate pushdown, schema evolution, and file sizing.\n",
    "domains": [
      "specialization:data-engineering-analytics"
    ],
    "expertiseLevels": [
      "intermediate",
      "expert"
    ]
  },
  "outgoingEdges": [
    {
      "from": "skill-area:columnar-storage",
      "to": "specialization:data-engineering-analytics",
      "kind": "applies_to",
      "attributes": {
        "confidence": "primary"
      }
    }
  ],
  "incomingEdges": [
    {
      "from": "skill-area:data-analysis",
      "to": "skill-area:columnar-storage",
      "kind": "prerequisite_for_learning",
      "attributes": {
        "strength": "recommended"
      }
    },
    {
      "from": "skill-area:column-store-design",
      "to": "skill-area:columnar-storage",
      "kind": "prerequisite_for_learning",
      "attributes": {
        "strength": "recommended"
      }
    },
    {
      "from": "skill-area:data-lakehouse-architecture",
      "to": "skill-area:columnar-storage",
      "kind": "prerequisite_for_learning",
      "attributes": {
        "strength": "helpful"
      }
    },
    {
      "from": "stack-profile:data-lake-stack",
      "to": "skill-area:columnar-storage",
      "kind": "requires_skill_area"
    },
    {
      "from": "lib-agent:data-engineering-analytics--data-warehouse-architect",
      "to": "skill-area:columnar-storage",
      "kind": "lib_requires_skill_area",
      "attributes": {
        "weight": 0.7
      }
    },
    {
      "from": "lib-skill:data-engineering-analytics--obt-design-optimizer",
      "to": "skill-area:columnar-storage",
      "kind": "lib_requires_skill_area",
      "attributes": {
        "weight": 0.7
      }
    },
    {
      "from": "role:storage-engineer",
      "to": "skill-area:columnar-storage",
      "kind": "requires_expertise",
      "attributes": {}
    },
    {
      "from": "workflow:data-warehouse-cost-optimization",
      "to": "skill-area:columnar-storage",
      "kind": "requires_skill_area",
      "attributes": {}
    }
  ]
}