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Add quick examples.

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Dave Longley 2013-09-16 14:14:35 -04:00
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README.md
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@ -31,6 +31,67 @@ to JSON with added semantics. Finally, the format is intended to be fast
to parse, fast to generate, stream-based and document-based processing
compatible, and require a very small memory footprint in order to operate.
## Quick Examples
```php
$doc = (object)array(
"http://schema.org/name" => "Manu Sporny",
"http://schema.org/url" => {"@id": "http://manu.sporny.org/"},
"http://schema.org/image" => {"@id": "http://manu.sporny.org/images/manu.png"});
$context = (object)array(
"name" => "http://schema.org/name",
"homepage" => {"@id": "http://schema.org/url", "@type": "@id"},
"image" => {"@id": "http://schema.org/image", "@type": "@id"});
// compact a document according to a particular context
// see: http://json-ld.org/spec/latest/json-ld/#compacted-document-form
$compacted = jsonld_compact($doc, $context);
echo json_encode($compacted, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
/* Output:
{
"@context": {...},
"image": "http://manu.sporny.org/images/manu.png",
"homepage": "http://manu.sporny.org/",
"name": "Manu Sporny"
}
*/
// compact using URLs
jsonld_compact('http://example.org/doc', 'http://example.org/context');
// expand a document, removing its context
// see: http://json-ld.org/spec/latest/json-ld/#expanded-document-form
$expanded = jsonld_expand($compacted) {
echo json_encode($expanded, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
/* Output:
{
"http://schema.org/image": [{"@id": "http://manu.sporny.org/images/manu.png"}],
"http://schema.org/name": [{"@value": "Manu Sporny"}],
"http://schema.org/url": [{"@id": "http://manu.sporny.org/"}]
}
*/
// expand using URLs
jsonld_expand('http://example.org/doc');
// flatten a document
// see: http://json-ld.org/spec/latest/json-ld/#flattened-document-form
$flattened = jsonld_flatten($doc);
// all deep-level trees flattened to the top-level
// frame a document
// see: http://json-ld.org/spec/latest/json-ld-framing/#introduction
$framed = jsonld_frame($doc, $frame);
// document transformed into a particular tree structure per the given frame
// normalize a document
$normalized = jsonld_normalize($doc, array('format' => 'application/nquads'));
// normalized is a string that is a canonical representation of the document
// that can be used for hashing
```
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