post:
  tags:
    - Flow Services
  summary: Text Load - load text documents
  description: |
    Load text documents into processing pipeline for indexing and embedding.

    ## Text Load Overview

    Fire-and-forget document loading:
    - **Input**: Text content (raw UTF-8 or base64 encoded)
    - **Process**: Chunk, embed, store
    - **Output**: None (202 Accepted)

    Asynchronous processing - document queued for background processing.

    ## Processing Pipeline

    Text documents go through:
    1. **Chunking**: Split into overlapping chunks
    2. **Embedding**: Generate vectors for each chunk
    3. **Storage**: Store chunks + embeddings
    4. **Indexing**: Make searchable via document-embeddings query

    Pipeline runs asynchronously after request returns.

    ## Text Format

    Text may be sent as raw UTF-8 text:
    ```
    {
      "text": "Cancer survival: 2.74× higher hazard ratio"
    }
    ```

    Older clients may still send base64 encoded text:
    ```
    text_content = "This is the document..."
    encoded = base64.b64encode(text_content.encode('utf-8'))
    ```

    Default charset is UTF-8, specify `charset` if different.

    ## Metadata

    Optional RDF triples describing document:
    - Title, author, date
    - Source URL
    - Custom properties
    - Used for organization and retrieval

    ## Use Cases

    - **Document ingestion**: Add documents to knowledge base
    - **Bulk loading**: Process multiple documents
    - **Content updates**: Replace existing documents
    - **Library integration**: Load from document library

    ## No Response Data

    Returns 202 Accepted immediately:
    - Document queued for processing
    - No synchronous result
    - No processing status
    - Check document-embeddings query later to verify indexed

  operationId: textLoadService
  security:
    - bearerAuth: []
  parameters:
    - name: flow
      in: path
      required: true
      schema:
        type: string
      description: Flow instance ID
      example: my-flow
  requestBody:
    required: true
    content:
      application/json:
        schema:
          $ref: '../../components/schemas/loading/TextLoadRequest.yaml'
        examples:
          simpleLoad:
            summary: Load text document
            value:
              text: This is the document text...
              id: doc-123
              user: alice
              collection: research
          withMetadata:
            summary: Load with RDF metadata using base64 text
            value:
              text: UXVhbnR1bSBjb21wdXRpbmcgdXNlcyBxdWFudHVtIG1lY2hhbmljcyBwcmluY2lwbGVzLi4u
              id: doc-456
              user: alice
              collection: research
              metadata:
                - s: {v: "doc-456", e: false}
                  p: {v: "http://purl.org/dc/terms/title", e: true}
                  o: {v: "Introduction to Quantum Computing", e: false}
                - s: {v: "doc-456", e: false}
                  p: {v: "http://purl.org/dc/terms/creator", e: true}
                  o: {v: "Dr. Alice Smith", e: false}
  responses:
    '202':
      description: Document accepted for processing
      content:
        application/json:
          schema:
            type: object
            properties: {}
          example: {}
    '401':
      $ref: '../../components/responses/Unauthorized.yaml'
    '500':
      $ref: '../../components/responses/Error.yaml'