Hypertext Application Language (HAL) is an Internet Draft (a “work in progress”) standard convention for defining hypermedia such as links to external resources within JSON or XML code. The two associated MIME types are media type: application/hal+xml and media type: application/hal+json. HAL was created to be . Ion parsers MUST identify any JSON object as an Ion File either a type member equal to the octet sequence file or the. “Hypermedia Types are MIME media types that contain native hyper-linking semantics that induce application flow. For example, HTML is a hypermedia type; .

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It was a typo and has been corrected.

Hypermedia Types

If so, what should the entity-body look like? If an Ion Value Object has an array type and the Ion Value Object also contains minminlengthmaxmaxlength or pattern members, those members’ validation rules apply to each element in the value array, not the array itself.

The attributes for a link include hreflangmediatitleand typeand any extension link parameters. If you think of a webpage, using HTML — the Hypertext Markup Language — text is then interpreted by a browser to become a webpage, or an interactive environment capable of doing more than just providing a blob of text.

Retrieved from ” https: The reason is that other members within the Collection Object may provide additional contextual information about the value array itself or the elements in the value array, something not possible with a direct array. Terminology These terms are defined by this specification: If you do fill out the form, you can put whatever you want in the message field although the hipermeria might reject certain values.


An Ion Form is then typefils a collection of form fields with additional metadata that controls how the form fields are submitted to a linked resource location. If trueuser agents MUST mask the value so it is not directly visible to the user. It is in the draft stage at this time. In Summary Hypermedia is often misunderstood in regards to APIsbut essentially it functions exactly like links on a webpage. If the field type value does not equal array or setan Ion parser MUST ignore any discovered minsize member for that field.

The minlength member is a non-negative integer that specifies the minimum number of characters the field value must contain.

Those brackets identify the string as a URI Template. Examples All following examples are non-normative.

They have the same protocol semantics. Associating the latest-posts link with the doc documentation CURIE results in a link ‘rel’ set to doc: Anything else would be an unusable throwback to the s. But the two links have different application semantics.

You tupefile read more and make your cookie choices here. Hypermedia prevents APIs from breaking Absolutely false. This value is the unqualified file name, without path information.

That is, a computer can somehow take a URL and get a representation of the underlying resource. For now, if you would like to have a full understanding please read the formal specification.


HAL – Hypertext Application Language

It also gives you the power to change certain aspects of your API i. Within the review period, the Designated Expert s will either approve or deny the registration request, communicating this decision by closing the issue.

The enabled member indicates whether or not the field value may be modified or submitted to a linked resource location.

In the links, the href value should either be absolute or relative to the current request uri. This specification registers the Type Names defined in Section 8. The form member value is either a Form object or a Link to a Form object that reflects the required object structure of the Field value. The two associated MIME types are media type: If the min member is present, the max value must be greater than or equal to the min value.

An HTTP request has four parts: The corresponding Form Submission Object for this form might look like this: The href hypermedia reference member identifies the target IRI Internationalized Resource Identifier location of the resource.

This is what is known as “discoverability”. Ion parsers MUST ignore both the minlength and maxlength members if the maxlength value is less than the minlength value.

But URI Templates, a different hypermedia technology, can do this.