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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.

Copyright Notice

Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.

This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document.









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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].
















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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.



[Add New Entry]


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.


...

...




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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: ...


Use
this form
 to create a new entry.


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.





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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.






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Appendix A. Acknowledgements

The author gratefully acknowledges the contributions of Jan
Algermissen.

Author's Address

Ioseb Dzmanashvili

EMail: ioseb.dzmanashvili@gmail.com









































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