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Independent Submission I. Dzmanashvili
Request for Comments: 6861 January 2013
Category: Informational
ISSN: 2070-1721
The "create-form" and "edit-form" Link Relations
Abstract
RFC 5988 standardized a means of indicating the relationships between
resources on the Web. This specification defines link relation types
that may be used to express the relationships between a resource and
an input form for constructing data submissions.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This is a contribution to the RFC Series, independently of any other
RFC stream. The RFC Editor has chosen to publish this document at
its discretion and makes no statement about its value for
implementation or deployment. Documents approved for publication by
the RFC Editor are not a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6861.
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Dzmanashvili Informational [Page 1]
RFC 6861 "create-form" and "edit-form" January 2013 Table of Contents 1. Introduction ....................................................2 2. Notational Conventions ..........................................2 3. Link Relations ..................................................3 3.1. The "create-form" Link Relation Type .......................3 3.1.1. Using the "create-form" Link Relation ...............3 3.2. The "edit-form" Link Relation Type .........................3 3.2.1. Using the "edit-form" Link Relation .................4 3.3. Error-Handling Example .....................................4 4. IANA Considerations .............................................4 4.1. The Link Relation Registration "create-form" ...............4 4.2. The Link Relation Registration "edit-form" .................5 5. Security Considerations .........................................5 6. Internationalisation Considerations .............................5 7. Normative References ............................................5 Appendix A. Acknowledgements .......................................6 1. Introduction RFC 5988 [RFC5988] standardized a means of indicating the relationships between resources on the Web. This specification defines link relation types that may be used to express the relationships between a resource and an input form for constructing data submissions. The "create-form" and "edit-form" link relations are intentionally generic, and they can be used with multiple media types in a wide variety of use cases. 2. Notational Conventions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. Dzmanashvili Informational [Page 2]
RFC 6861 "create-form" and "edit-form" January 2013 3. Link Relations The following link relations are defined. 3.1. The "create-form" Link Relation Type When included in a response, the "create-form" link relation indicates a target resource that represents a form that can be used to append a new member to the link context. <html> <ul> <li>Entry Description 1</li> <li>Entry Description 2</li> </ul> <a href="..." rel="create-form">[Add New Entry]</a> </html> or, expressed as a Link header Link: <...>; rel="create-form"; title="Add New Entry" 3.1.1. Using the "create-form" Link Relation If the form representation includes a submission URI, this URI MUST be used to submit the form. The context URI SHOULD be used otherwise. If the form representation includes a submission method, this method MUST be used for submit requests. HTTP's POST method SHOULD be used otherwise. 3.2. The "edit-form" Link Relation Type When included in a response, the "edit-form" link relation indicates a target resource that represents a form that can be used for updating the context resource. <html> ... <ul> <li> Entry Description 1 <a href="..." rel="edit-form">[Edit Entry]</a> </li> </ul> ... </html> Dzmanashvili Informational [Page 3]
RFC 6861 "create-form" and "edit-form" January 2013 or, expressed as a Link header Link: <...>; rel="edit-form"; title="Edit Entry" 3.2.1. Using the "edit-form" Link Relation If the form representation includes a submission URI, this URI MUST be used to submit the form. The context URI SHOULD be used otherwise. If the form representation includes a submission method, this method MUST be used for submit requests. HTTP's PUT method SHOULD be used otherwise. 3.3. Error-Handling Example When submitting forms in unsupported media type format, service may respond to the client with HTTP's 415 Unsupported Media Type status code. HTTP/1.1 415 Unsupported Media Type Link: <...>; rel="create-form"; title="Create new entry" Content-Type: text/html Content-Length: ... <html> Use <a href="..." rel="create-form"> this form </a> to create a new entry. </html> 4. IANA Considerations IANA has registered the "create-form" and "edit-form" link relations below as per [RFC5988]. 4.1. The Link Relation Registration "create-form" Relation Name: create-form Description: The target IRI points to a resource where a submission form can be obtained. Dzmanashvili Informational [Page 4]
RFC 6861 "create-form" and "edit-form" January 2013 Security considerations: Automated agents should take care when this relation crosses administrative domains (e.g., the URI has a different authority than the current document). Reference: See Section 3. 4.2. The Link Relation Registration "edit-form" Relation Name: edit-form Description: The target IRI points to a resource where a submission form for editing the associated resource can be obtained. Security Considerations: Automated agents should take care when this relation crosses administrative domains (e.g., the URI has a different authority than the current document). Reference: See Section 3. 5. Security Considerations See Section 7 of RFC 5988 [RFC5988]. 6. Internationalisation Considerations See Section 8 of RFC 5988 [RFC5988]. 7. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC5988] Nottingham, M., "Web Linking", RFC 5988, October 2010. Dzmanashvili Informational [Page 5]
RFC 6861 "create-form" and "edit-form" January 2013 Appendix A. Acknowledgements The author gratefully acknowledges the contributions of Jan Algermissen. Author's Address Ioseb Dzmanashvili EMail: ioseb.dzmanashvili@gmail.com Dzmanashvili Informational [Page 6]