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Any document you can write to takes files dropped from your desktop. What a drop does is decided per file:

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RDF

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A file in one of the triple syntaxes — .ttl, .nt, .rdf, .owl or .jsonld — is imported as data: its triples are added to the document's graph

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File

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Anything else is uploaded to the document: the bytes are stored content-addressed under uploads/ and the document describes them as a file, titled after the filename

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1. Open the document that should hold the file
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2. Drag the file over the page. An overlay appears, naming both outcomes: RDF imported as data, File uploaded to this document
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3. Drop it. The document reloads in Read mode with the file among its resources; an image is shown inline
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A file larger than the instance's upload limit is refused before it reaches the platform, and the page says so without navigating away.

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Alternatively, upload through a form:

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1. Click the Create expand_more dropdown at the bottom of the page
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2. Click on File in the dropdown list that appears
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3. Fill out the mandatory File fields in the form:\n

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   Filename

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   Select file from your filesystem

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   Title

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   Enter file title

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4. Click Save
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A file is uploaded to the document that will hold it, so create that document first. Uploading Nancy Davolio's portrait from the Northwind demo:

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doc=$(ldh create item \\\n  --title \"Nancy Davolio\" \\\n  --container \"${LDH_BASE}employees/\")\n\nldh add file \\\n  --title \"Nancy Davolio\" \\\n  --file employees/nancy.jpg \\\n  --content-type \"image/jpeg\" \\\n  \"$doc\"

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The command prints the content-addressed URI of the upload as its only output:

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https://localhost:4443/uploads/35fd362792e8c4bc3560a6de02f25ee551d68d02

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That URI is stable across instances — it is derived from the file content alone — which is what lets the\n Northwind CSVs reference their images by hash before they are even uploaded.\n --content-type is optional — the media type is detected from the file when it is not given.

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