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Changing partition strategy for a PDF

Here’s how you can modify partition strategy for a pdf file, and select an alternative model to use with Unstructured API. The hi_res strategy supports different models, and the default is detectron2onnx. 
 curl -X 'POST' <YOUR_API_URL> \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -H 'unstructured-api-key: <YOUR_API_KEY>' \
  -F 'files=@sample-docs/layout-parser-paper.pdf' \
  -F 'strategy=hi_res' \
  -F 'hi_res_model_name=chipper'
If you have a local deployment of the Unstructured API, you can use other supported models, such as yolox.

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Specifying the language of a document for better OCR results

For better OCR results, you can specify what languages your document is in using the languages parameter. See the Tesseract documentation for a full list of languages. 
curl -X 'POST' <YOUR_API_URL> \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -H 'unstructured-api-key: <YOUR_API_KEY>' \
  -F 'files=@sample-docs/korean.png' \
  -F 'strategy=hi_res' \
  -F 'languages=kor'

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Saving bounding box coordinates

When elements are extracted from PDFs or images, it may be useful to get their bounding boxes as well. Set the coordinates parameter to true to add this field to the elements in the response. 
 curl -X 'POST' <YOUR_API_URL> \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -H 'unstructured-api-key: <YOUR_API_KEY>' \
  -F 'files=@sample-docs/layout-parser-paper.pdf' \
  -F 'coordinates=true'

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Returning unique element IDs

By default, the element ID is a SHA-256 hash of the element text. This is to ensure that the ID is deterministic. One downside is that the ID is not guaranteed to be unique. Different elements with the same text will have the same ID, and there could also be hash collisions. To use UUIDs in the output instead, set unique_element_ids=true. Note: this means that the element IDs will be random, so with every partition of the same file, you will get different IDs. This can be helpful if you’d like to use the IDs as a primary key in a database, for example. 
curl -X 'POST' <YOUR_API_URL> \
 -H 'accept: application/json'  \
 -H 'Content-Type: multipart/form-data' \
 -H 'unstructured-api-key: <YOUR_API_KEY>' \
 -F 'files=@sample-docs/layout-parser-paper-fast.pdf' \
 -F 'unique_element_ids=true'

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Adding the chunking step after partitioning

You can combine partitioning and subsequent chunking in a single request by setting the chunking_strategy parameter. By default, the chunking_strategy is set to None, and no chunking is performed. 
curl -X 'POST' <YOUR_API_URL> \
 -H 'accept: application/json'  \
 -H 'Content-Type: multipart/form-data' \
 -H 'unstructured-api-key: <YOUR_API_KEY>' \
 -F 'files=@sample-docs/layout-parser-paper-fast.pdf' \
 -F 'chunking_strategy=by_title' \
 -F 'max_characters=1024'