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。

# 篩選匯出內容的範例
<a name="export-filtering-examples"></a>

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
<a name="export-property-graph-filtering-examples"></a>

### 使用 `scope` 僅匯出邊緣的範例
<a name="export-property-graph-filtering-scope-example"></a>

```
{
  "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
<a name="export-property-graph-filtering-labels-example"></a>

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
<a name="export-property-graph-filtering-filter-example"></a>

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
<a name="export-property-graph-filtering-gremlinFilter-example"></a>

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
<a name="export-property-graph-filtering-gremlinNodeFilter-example"></a>

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
<a name="export-property-graph-filtering-gremlinEdgeFilter-example"></a>

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`、`nodeLabels` `edgeLabels` 和 `scope`
<a name="export-property-graph-filtering-combo-example"></a>

此範例中的 `filter` 物件會匯出：
+ `country` 節點及其 `type`、`code` 及 `desc` 屬性
+ `airport` 節點及其 `code`、`icao` 及 `runways` 屬性
+ `route` 邊緣及其 `dist` 屬性

`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
<a name="export-RDF-filtering-examples"></a>

### 使用 `rdfExportScope` 和 `sparql` 匯出特定邊緣
<a name="export-RDF-filtering-rdfExportScope-sparql-example"></a>

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
<a name="export-RDF-filtering-rdfExportScope-sparql-namedGraph-example"></a>

此範例匯出屬於具名圖形 <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"
}
```