JSON-LD (JavaScript Object Notation for Linked Data, also known as Linked Data JSON or JSON-LD) is a notation for Linked Data.It uses JSON to represent data from multiple sources.

Using JSON-LD, users can extract existing information into Web-Linked schema without rewriting the information. The advantage of JSON-LD is that it is used to implement more expressive languages ​​(also known as RDF expressions), with more semantic and rich data structures, and more intelligent representation levels.

JSON-LD is a new type of Web standard based on JSON to represent joint data. Its core concept is to use JSON objects to represent RDF (Resource Description Framework, also known as Resource Description Language in Chinese), so that organized data can be independently stored in Sharing, automated reasoning and exchange in a web environment. JSON-LD can not only use JSON as the representation of RDF, but also help to build a Linked Data Web (Linked Data Web). On this Linked Data Web, the client’s RDF link service can extract RDF links from Web pages. The client can also publish RDF links.

JSON-LD can use the perspective of semantic tags to describe resources in the Web environment and the relationship between them. In the RDF expression mode, in the property-value pair (property-value) model, there are mainly three representations, namely property, topic, and value. In the representation of JSON-LD, each attribute has an attribute name as its key, and the attribute value can be a label, a string, a Boolean value or an array, a JSON object, and so on. Using JSON-LD, information can be represented by combining RDF and Web schemas to represent links, thereby transforming various data source formats into organized information. JSON-LD also has the following advantages:

1. JSON-LD essentially uses JSON to implement Linked Data in a web environment, so it has good readability, findability and spreadability, and is very efficient to use.
2. JSON-LD has provided you with a standard interface compatible with most web applications, and has a clear normalization capability, which can standardize and connect data from different sources so that clients can more easily obtain the required information .
3. JSON-LD provides many advantages, such as how to encapsulate JSON into a more complex data representation, and how to construct complex expression structures through JSON, etc.

In general, JSON-LD aims to use JSON to encapsulate information, perform more detailed data analysis, and support complex expression structures, making connection data easier to be shared, automatically reasoned, and exchanged. It can be used not only for the Linked Data of the constructed Web, but also for various environments. organize.