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Intelligent Media Management:ContextualRetrieval

Last Updated:Feb 26, 2026

Retrieves semantically similar documents. The operation is designed for multi-turn conversations and can process message input in historical conversations. The operation returns results that are highly related to the current conversation based on an in-depth understanding of contextual content. It provides consistent and efficient information retrieval in multi-turn conversations.

Operation description

注意事项

  • 请确保在使用该接口前,已充分了解智能媒体管理产品的收费方式和价格

  • 调用该接口前,请确保您已通过绑定方式( CreateBinding )或者主动索引( IndexFileMeta 或者 BatchIndexFileMeta )方式将文件索引到数据集(Dataset)中。

  • 返回结果仅为示例,根据工作流模板配置不同,获取到的文件元数据信息的类别和包含的内容均有可能与示例不同。如果有疑问,请使用钉钉搜索钉钉群号 21714099 加入钉钉群进行反馈。

使用限制

  • 历史对话长度最长限制为 100,包括用户消息和助手消息。

  • 每条消息长度不超过 1000 个汉字。

Try it now

Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

imm:ContextualRetrieval

none

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

ProjectName

string

Yes

The name of the project. For more information, see CreateProject.

test-project

DatasetName

string

Yes

The dataset.

test-dataset

Messages

array

Yes

The conversation or tool invocation history. The latest message is at the end of the list (with an index number of n-1), whereas the earliest message is at the beginning of the list (with an index number of 0). Historical messages must be provided in user-assistant pairs. The maximum number of messages that you can specify is 2*n+1. The current question cannot exceed 1,000 characters in length. The maximum number of historical messages allowed is 100.

ContextualMessage

No

The message list.

RecallOnly

boolean

No

Indicates whether to enable recall-only (embedding-based search). If you set this parameter to true, returned results have not been re-ranked and can be ranked in custom order. Default value: false.

false

SmartClusterIds

array

No

The IDs of clusters from which results are retrieved.

string

No

The ID of the cluster.

SmartCluster-01686226-be59-4391-a1ac-b7b073455de3

Response elements

Element

Type

Description

Example

object

Schema of Response

RequestId

string

The request ID.

6E93D6C9-5AC0-49F9-914D-E02678D3****

Results

array

The list of files retrieved. The document structure and content are contained in File.Elements.

File

The file.

Examples

Success response

JSON format

{
  "RequestId": "6E93D6C9-5AC0-49F9-914D-E02678D3****",
  "Results": [
    {
      "OwnerId": "102321002467****",
      "ProjectName": "test-project",
      "DatasetName": "test-dataset",
      "ObjectType": "file",
      "ObjectId": "75d5de2c50754e3dadd5c35dbca5f9949369e37eb342a73821f690c94c36c7f7",
      "UpdateTime": "2021-06-29T14:50:13.011643661+08:00",
      "CreateTime": "2021-06-29T14:50:13.011643661+08:00",
      "URI": "oss://test-bucket/test-object.jpg",
      "OSSURI": "oss://examplebucket/sampleobject.jpg",
      "Filename": "sampleobject.jpg",
      "MediaType": "image",
      "ContentType": "image/jpeg",
      "Size": 1000,
      "FileHash": "1d9c280a7c4f67f7ef873e28449dbe17",
      "FileModifiedTime": "2021-06-29T14:50:13.011643661+08:00",
      "FileCreateTime": "2021-06-29T14:50:13.011643661+08:00",
      "FileAccessTime": "2021-06-29T14:50:13.011643661+08:00",
      "ProduceTime": "2021-06-29T14:50:13.011643661+08:00",
      "LatLong": "30.134390,120.074997",
      "Timezone": "\"\"",
      "Addresses": [
        {
          "Language": "zh-Hans",
          "AddressLine": "中国浙江省杭州市余杭区文一西路969号",
          "Country": "中国",
          "Province": "浙江省",
          "City": "杭州市",
          "District": "余杭区",
          "Township": "文一西路"
        }
      ],
      "TravelClusterId": "-",
      "Orientation": 0,
      "Figures": [
        {
          "FigureId": "868a9e74-cde5-4c7a-9013-28bb984****",
          "FigureConfidence": 1,
          "FigureClusterId": "Cluster-dbe72fec-b84c-4ab6-885b-3678e64****",
          "FigureClusterConfidence": 1,
          "FigureType": "face",
          "Age": 29,
          "AgeSD": 5,
          "Gender": "female",
          "GenderConfidence": 1,
          "Emotion": "happiness",
          "EmotionConfidence": 0.70784568786621,
          "FaceQuality": 0.960875928401947,
          "Boundary": {
            "Width": 200,
            "Height": 300,
            "Left": 10,
            "Top": 30,
            "Polygon": [
              {
                "X": 10,
                "Y": 10
              }
            ]
          },
          "Mouth": "close",
          "MouthConfidence": 1,
          "Beard": "none",
          "BeardConfidence": 1,
          "Hat": "none",
          "HatConfidence": 1,
          "Mask": "none",
          "MaskConfidence": 1,
          "Glasses": "none",
          "GlassesConfidence": 0.8,
          "Sharpness": 0.7,
          "Attractive": 0.96,
          "HeadPose": {
            "Pitch": 18.385589599609375,
            "Roll": 4.204030513763428,
            "Yaw": 2.4945924282073975
          }
        }
      ],
      "FigureCount": 10,
      "Labels": [
        {
          "Language": "zh-Hans",
          "LabelName": "椅子",
          "LabelLevel": 2,
          "LabelConfidence": 0.95,
          "ParentLabelName": "家具",
          "CentricScore": 0.877,
          "LabelAlias": "",
          "Clips": [
            {
              "TimeRange": [
                0
              ]
            }
          ]
        }
      ],
      "Title": "test",
      "ImageWidth": 270,
      "ImageHeight": 500,
      "EXIF": "{\"Compression\":{\"value\":\"6\"},\"DateTime\":{\"value\":\"2020:08:19 17:11:11\"}}",
      "ImageScore": {
        "OverallQualityScore": 0.736
      },
      "CroppingSuggestions": [
        {
          "AspectRatio": "2:3",
          "Confidence": 0.742,
          "Boundary": {
            "Width": 200,
            "Height": 300,
            "Left": 10,
            "Top": 30,
            "Polygon": [
              {
                "X": 10,
                "Y": 10
              }
            ]
          }
        }
      ],
      "OCRContents": [
        {
          "Language": "zh-hans",
          "Contents": "欢迎使用智能媒体管理",
          "Confidence": 0.8254936695098877,
          "Boundary": {
            "Width": 200,
            "Height": 300,
            "Left": 10,
            "Top": 30,
            "Polygon": [
              {
                "X": 10,
                "Y": 10
              }
            ]
          }
        }
      ],
      "VideoWidth": 1080,
      "VideoHeight": 1920,
      "VideoStreams": [
        {
          "Index": 0,
          "Language": "en",
          "CodecName": "h264",
          "CodecLongName": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
          "Profile": "High",
          "CodecTimeBase": "1373627/83160000",
          "CodecTagString": "avc1",
          "CodecTag": "0x31637661",
          "Width": 1280,
          "Height": 720,
          "HasBFrames": 2,
          "SampleAspectRatio": "1:1",
          "DisplayAspectRatio": "16:9",
          "PixelFormat": "yuv420p",
          "Level": 40,
          "FrameRate": "25/1",
          "AverageFrameRate": "25/1",
          "TimeBase": "1/12800",
          "StartTime": 0,
          "Duration": 22.88,
          "Bitrate": 5407765,
          "FrameCount": 572,
          "Rotate": "90",
          "BitDepth": 8,
          "ColorSpace": "bt709",
          "ColorRange": "tv",
          "ColorTransfer": "bt709",
          "ColorPrimaries": "bt709"
        }
      ],
      "Subtitles": [
        {
          "Index": 2,
          "Language": "en",
          "CodecName": "mov_text",
          "CodecLongName": "MOV text",
          "CodecTagString": "tx3g",
          "CodecTag": "0x67337874",
          "StartTime": 0,
          "Duration": 71.378,
          "Bitrate": 74,
          "Content": "欢迎",
          "Width": 600,
          "Height": 30
        }
      ],
      "AudioStreams": [
        {
          "Index": 1,
          "Language": "en",
          "CodecName": "aac",
          "CodecLongName": "AAC (Advanced Audio Coding)",
          "CodecTimeBase": "1/44100",
          "CodecTagString": "mp4a",
          "CodecTag": "0x6134706d",
          "TimeBase": "1/48000",
          "StartTime": 0.0235,
          "Duration": 3.690667,
          "Bitrate": 320087,
          "FrameCount": 173,
          "Lyric": "test",
          "SampleFormat": "fltp",
          "SampleRate": 48000,
          "Channels": 2,
          "ChannelLayout": "stereo"
        }
      ],
      "Artist": "Jane",
      "AlbumArtist": "Jane",
      "AudioCovers": [
        {
          "ImageWidth": 500,
          "ImageHeight": 820,
          "EXIF": "{\"FileSize\":{\"value\":\"29304\"},\"Format\":{\"value\":\"jpg\"}}",
          "ImageScore": {
            "OverallQualityScore": 0.736
          },
          "CroppingSuggestions": [
            {
              "AspectRatio": "2:3",
              "Confidence": 0.742
            }
          ],
          "OCRContents": [
            {
              "Language": "zh-hans",
              "Contents": "欢迎使用智能媒体管理",
              "Confidence": 0.8254936695098877
            }
          ]
        }
      ],
      "Composer": "Jane",
      "Performer": "Jane",
      "Language": "eng",
      "Album": "FirstAlbum",
      "PageCount": 5,
      "ETag": "\"1D9C280A7C4F67F7EF873E28449****\"",
      "CacheControl": "no-cache",
      "ContentDisposition": "attachment; filename =test.jpg",
      "ContentEncoding": "UTF-8",
      "ContentLanguage": "zh-CN",
      "AccessControlAllowOrigin": "https://aliyundoc.com",
      "AccessControlRequestMethod": "PUT",
      "ServerSideEncryptionCustomerAlgorithm": "SM4",
      "ServerSideEncryption": "AES256",
      "ServerSideDataEncryption": "SM4",
      "ServerSideEncryptionKeyId": "9468da86-3509-4f8d-a61e-6eab1eac****",
      "OSSStorageClass": "Standard",
      "OSSCRC64": "559890638950338001",
      "ObjectACL": "default",
      "ContentMd5": "HZwoCnxPZ/fvhz4oRJ2+Fw==",
      "OSSUserMeta": {
        "key": "val"
      },
      "OSSTaggingCount": 2,
      "OSSTagging": {
        "key": "val"
      },
      "OSSExpiration": "2120-01-01T12:00:00.000Z",
      "OSSVersionId": "CAEQNhiBgMDJgZCA0BYiIDc4MGZjZGI2OTBjOTRmNTE5NmU5NmFhZjhjYmY0****",
      "OSSDeleteMarker": "CAEQMhiBgIDXiaaB0BYiIGQzYmRkZGUxMTM1ZDRjOTZhNjk4YjRjMTAyZjhl****",
      "OSSObjectType": "Normal",
      "CustomId": "\t\nmember-image-id-0001",
      "CustomLabels": {
        "MemberName": "Tim",
        "Enabled": "True",
        "ItemCount": "10"
      },
      "StreamCount": 1,
      "ProgramCount": 1,
      "FormatName": "mov",
      "FormatLongName": "QuickTime / MOV",
      "StartTime": 0,
      "Bitrate": 13091201,
      "Duration": 15.263,
      "SemanticTypes": [
        "content"
      ],
      "Elements": [
        {
          "ElementContents": [
            {
              "Type": "text",
              "Content": "文本片段",
              "URL": "http://aliyun.com",
              "TimeRange": [
                500
              ]
            }
          ],
          "ObjectId": "id1",
          "ElementType": "title - 标题; image - 图片 ; table - 表格 ; narrative-text - 正文",
          "SemanticSimilarity": 0.8,
          "ElementRelations": [
            {
              "Type": "child,parent",
              "ObjectId": "id1"
            }
          ]
        }
      ],
      "SceneElements": [
        {
          "TimeRange": [
            100
          ],
          "FrameTimes": [
            30
          ],
          "VideoStreamIndex": 0,
          "Labels": [
            {
              "Language": "zh-Hans",
              "LabelName": "椅子",
              "LabelLevel": 2,
              "LabelConfidence": 0.95,
              "ParentLabelName": "家具",
              "CentricScore": 0.877,
              "LabelAlias": "",
              "Clips": [
                {
                  "TimeRange": [
                    0
                  ]
                }
              ]
            }
          ]
        }
      ],
      "OCRTexts": "阿里云IMM",
      "Reason": "[InternalError] The request has been failed due to some unknown error. status: 500, requestId: CC5ACFBD-BB7A-496D-A9D6-****",
      "ObjectStatus": "Indexed",
      "Insights": {
        "Video": {
          "Description": "无。",
          "Caption": "视频中展示了两个不同场景:一个是静止的白色盘子、黑色瓶子和透明玻璃杯,另一个是手拿着标有“YEZOLU”的洗发水瓶在浴室中缓慢上移。"
        },
        "Image": {
          "Caption": "无。",
          "Description": "图片中有一人,穿着深色西装外套,内搭白色衬衫。背景为渐变的浅蓝色至灰色。"
        }
      }
    }
  ]
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.