apoc.nlp.azure.entities.graph
过程 Apoc 扩展
为提供的文本创建(虚拟)实体图
安装依赖
NLP 过程依赖于 Kotlin 和客户端库,这些库未包含在 APOC Extended 库中。
这些依赖项包含在 apoc-nlp-dependencies-2025.10.0-all.jar 中,可从 发布页面 下载。下载该文件后,应将其放入 plugins 目录并重启 Neo4j 服务器。
设置 API 密钥
我们可以按照 快速入门:使用文本分析客户端库 文章中的说明生成 API 密钥和 URL。完成后,我们应该能看到一个列出凭据的页面,类似于下面的截图
在本例中,我们的 API URL 是 https://neo4j-nlp-text-analytics.cognitiveservices.azure.com/,我们可以使用其中任一隐藏的密钥。
让我们填充并执行以下命令来创建包含这些详细信息的参数。
apiKey 和 apiSecret 参数
:param apiKey => ("<api-key-here>");
:param apiUrl => ("<api-url-here>");
或者,我们可以将这些凭据添加到 apoc.conf 中,并使用静态值存储函数来检索它们。
apoc.static.azure.apiKey=<api-key-here>
apoc.static.azure.apiUrl=<api-url-here>
apoc.conf 中检索 AWS 凭据
RETURN apoc.static.getAll("azure") AS azure;
| azure |
|---|
{apiKey: "<api-key-here>", apiUrl: "<api-url-here>"} |
用法示例
本节中的示例基于以下示例图
CREATE (:Article {
uri: "/blog/pokegraph-gotta-graph-em-all/",
body: "These days I’m rarely more than a few feet away from my Nintendo Switch and I play board games, card games and role playing games with friends at least once or twice a week. I’ve even organised lunch-time Mario Kart 8 tournaments between the Neo4j European offices!"
});
CREATE (:Article {
uri: "https://en.wikipedia.org/wiki/Nintendo_Switch",
body: "The Nintendo Switch is a video game console developed by Nintendo, released worldwide in most regions on March 3, 2017. It is a hybrid console that can be used as a home console and portable device. The Nintendo Switch was unveiled on October 20, 2016. Nintendo offers a Joy-Con Wheel, a small steering wheel-like unit that a Joy-Con can slot into, allowing it to be used for racing games such as Mario Kart 8."
});
我们可以使用此过程自动创建实体图。除了拥有 Entity 标签外,每个实体节点还将根据 type 属性的值拥有另一个标签。默认情况下,返回的是虚拟图。
以下返回 Pokemon 和 Nintendo Switch 文章的实体虚拟图
MATCH (a:Article)
WITH collect(a) AS articles
CALL apoc.nlp.azure.entities.graph(articles, {
key: $apiKey,
url: $apiUrl,
nodeProperty: "body",
writeRelationshipType: "ENTITY"
})
YIELD graph AS g
RETURN g
我们可以在《宝可梦与任天堂 Switch 实体图》中查看该虚拟图的 Neo4j Browser 可视化效果。
在此可视化中,我们还可以看到每个实体节点的得分。此得分代表 API 对其检测该实体的置信度。我们可以使用 scoreCutoff 属性为得分指定最低截止值。
以下返回 Pokemon 和 Nintendo Switch 文章得分 >= 0.7 的实体虚拟图
MATCH (a:Article)
WITH collect(a) AS articles
CALL apoc.nlp.azure.entities.graph(articles, {
key: $apiKey,
url: $apiUrl,
nodeProperty: "body",
scoreCutoff: 0.7,
writeRelationshipType: "ENTITY"
})
YIELD graph AS g
RETURN g
我们可以在《置信度 >= 0.7 的宝可梦与任天堂 Switch 实体图》中查看该虚拟图的 Neo4j Browser 可视化效果。
如果我们对这个图感到满意并希望将其持久化到 Neo4j 中,可以通过指定 write: true 配置来实现。
以下创建从文章到每个实体的 HAS_ENTITY 关系
MATCH (a:Article)
WITH collect(a) AS articles
CALL apoc.nlp.azure.entities.graph(articles, {
key: $apiKey,
url: $apiUrl,
nodeProperty: "body",
scoreCutoff: 0.7,
writeRelationshipType: "HAS_ENTITY",
writeRelationshipProperty: "azureEntityScore",
write: true
})
YIELD graph AS g
RETURN g;
然后,我们可以编写一个查询来返回已创建的实体。
以下返回文章及其对应的实体
MATCH (article:Article)
RETURN article.uri AS article,
[(article)-[r:HAS_ENTITY]->(e:Entity) | {text: e.text, score: r.azureEntityScore}] AS entities;
| article | entities |
|---|---|
"/blog/pokegraph-gotta-graph-em-all/" |
[{score: 0.72, text: "Mario Kart"}, {score: 0.7802000593632747, text: "Mario Kart 8"}, {score: 0.8, text: "8"}, {score: 0.8, text: "a week"}, {score: 0.94, text: "Nintendo Switch"}, {score: 0.8150388253887939, text: "Neo4j"}] |
"https://en.wikipedia.org/wiki/Nintendo_Switch" |
[{score: 0.9023679924293266, text: "Joy-Con"}, {score: 0.98, text: "Nintendo"}, {score: 0.8, text: "March 3, 2017"}, {score: 0.9355623498560008, text: "Nintendo Switch"}, {score: 0.92, text: "Mario Kart"}, {score: 0.8, text: "8"}, {score: 0.8863202650046607, text: "Mario Kart 8"}, {score: 0.8, text: "October 20, 2016"}] |
如果我们想要流式返回实体并对结果应用自定义逻辑,请参阅 apoc.nlp.azure.entities.stream。