篩選匯出內容的範例

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

以下範例說明篩選所匯出資料的方式。

篩選屬性圖資料的匯出

使用 scope 僅匯出邊緣的範例

{
  "command": "export-pg",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "scope": "edges"
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

使用 nodeLabels 和 edgeLabels 僅匯出具有特定標籤之節點和邊緣的範例

下列範例中的 nodeLabels 參數指定只應匯出具有 Person 標籤或 Post 標籤的節點。edgeLabels 參數指定僅應匯出具有 likes 標籤的邊緣：

{
  "command": "export-pg",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "nodeLabels": ["Person", "Post"],
    "edgeLabels": ["likes"]
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

使用 filter 僅匯出所指定節點、邊緣和屬性的範例

此範例中的 filter 物件會匯出 country 節點及其 type、code 和 desc 屬性，也會匯出 route 邊緣及其 dist 屬性。

{
  "command": "export-pg",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "filter": {
      "nodes": [
        {
          "label": "country",
          "properties": [
            "type",
            "code",
            "desc"
          ]
        }
      ],
      "edges": [
        {
          "label": "route",
          "properties": [
            "dist"
          ]
        }
      ]
    }
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

使用 gremlinFilter 的範例

此範例會使用 gremlinFilter 僅匯出在 2021-10-10 之後建立的節點和邊緣 (也就是說，具有其值大於 2021-10-10 的 created 屬性)：

{
  "command": "export-pg",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "gremlinFilter" : "has(\"created\", gt(datetime(\"2021-10-10\")))"
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

使用 gremlinNodeFilter 的範例

此範例會使用 gremlinNodeFilter 僅匯出已刪除的節點 (布林 deleted 屬性值為 true 的節點)：

{
  "command": "export-pg",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "gremlinNodeFilter" : "has(\"deleted\", true)"
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

使用 gremlinEdgeFilter 的範例

此範例會使用 gremlinEdgeFilter 僅匯出其 strength 數值屬性值為 5 的邊緣：

{
  "command": "export-pg",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "gremlinEdgeFilter" : "has(\"strength\", 5)"
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

合併 filter、gremlinNodeFilter、nodeLabelsedgeLabels 和 scope

此範例中的 filter 物件會匯出：

gremlinNodeFilter 參數會篩選節點，以便僅匯出其 code 屬性值以 A 開始的節點。

nodeLabels 和 edgeLabels 參數會進一步限制輸出，以便僅匯出 airport 節點和 route 邊緣。

最後，scope 參數會從匯出中消除邊緣，這樣只會在輸出中留下指定的 airport 節點。

{
  "command": "export-pg",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "filter": {
      "nodes": [
        {
          "label": "airport",
          "properties": [
            "code",
            "icao",
            "runways"
          ]
        },
        {
          "label": "country",
          "properties": [
            "type",
            "code",
            "desc"
          ]
        }
      ],
      "edges": [
        {
          "label": "route",
          "properties": [
            "dist"
          ]
        }
      ]
    },
    "gremlinNodeFilter": "has(\"code\", startingWith(\"A\"))",
    "nodeLabels": [
      "airport"
    ],
    "edgeLabels": [
      "route"
    ],
    "scope": "nodes"
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

篩選 RDF 資料的匯出

使用 rdfExportScope 和 sparql 匯出特定邊緣

此範例會匯出其述詞為 <http://kelvinlawrence.net/air-routes/objectProperty/route> 且其物件不是常值的三元組：

{
  "command": "export-rdf",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "rdfExportScope": "query",
    "sparql": "CONSTRUCT { ?s <http://kelvinlawrence.net/air-routes/objectProperty/route> ?o } WHERE { ?s ?p ?o . FILTER(!isLiteral(?o)) }"
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}

使用 namedGraph 匯出單一具名圖形

此範例匯出屬於名為圖表 <http://aws.amazon.com/neptune/vocab/v01/DefaultNamedGraph> 的三元組：

{
  "command": "export-rdf",
  "params": {
    "endpoint": "(your Neptune endpoint DNS name)",
    "rdfExportScope": "graph",
    "namedGraph": "http://aws.amazon.com/neptune/vocab/v01/DefaultNamedGraph"
  },
  "outputS3Path": "s3://(your Amazon S3 bucket)/neptune-export"
}