create_skillset.json

{
    "description": "Crack documents.",
    "skills": [
        {
            "@odata.type": "#Microsoft.Skills.Vision.ImageAnalysisSkill",
            "context": "/document/normalized_images/*",
            "defaultLanguageCode": "en",
            "visualFeatures": [
                "tags",
                "categories",
                "description",
                "faces",
                "brands"
            ],
			"inputs": [
                {
                    "name": "image",
                    "source": "/document/normalized_images/*"
                }
            ],
            "outputs": [
                {
                    "name": "categories"
                },
                {
                    "name": "tags"
                },
                {
                    "name": "description"
                },
                {
                    "name": "faces"
                },
                {
                    "name": "brands"
                }
            ]
        },
        {
            "@odata.type": "#Microsoft.Skills.Custom.WebApiSkill",
            "description": "A custom skill that finds the topn most similar images",
            "uri": "https://[your site].azurewebsites.net/api/extraction",
            "timeout": "PT160S",
            "batchSize": 1,
            "context": "/document/normalized_images/*",
            "httpHeaders": {
                "Ocp-Apim-Subscription-Key": "yoursecretkey"
            },
            "httpMethod": "POST",
            "inputs": [
			    {
			        "name": "images",
			        "source": "/document/normalized_images/*"
			    }
            ],
            "outputs": [
                {
                    "name": "most_similar"
                }
            ]
        }
    ],
    "cognitiveServices": {
        "@odata.type": "#Microsoft.Azure.Search.CognitiveServicesByKey",
        "description": "cogsvc",
        "key": ""
    },
     "knowledgeStore": {
      "storageConnectionString": "an Azure storage connection string",
      "projections" : [
        {
          "tables": [
            { "tableName": "MainTable", "generatedKeyName": "SomeId", "source": "/document/normalized_images/*/most_similar" }
          ]
        },
        {
          "objects": [ ]
        },
        {
            "files": [ ]
        }
      ]
    }
}