Edit comment LC-2050 for Mobile Web Best Practices Working Group

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Comment LC-2050

Comment Shortname:

Commenter: casays <casays@yahoo.com>

Message-id:

Section of the document concerned:

[Free text description]Document as a wholeContent Transformation Guidelines 1.0 Abstract Status of this Document Table of Contents Appendices 1 Introduction (Non-Normative) 1.1 Purpose 1.2 Audience 1.3 Scope 1.4 Summary of Requirements 2 Terminology (Normative) 2.1 Types of Proxy "A transparent proxy is a proxy that does not modify the req... A non-transparent proxy is a proxy that modifies the request... 2.2 Types of Transformation Restructuring content is a process whereby the original layo... Recoding content is a process whereby the layout of the cont... Optimizing content includes removing redundant white space,... 3 Conformance (Normative) 3.1 Classes of Product 3.2 Normative and Informative Parts 3.3 Normative Language for Conformance Requirements 3.4 Content Deployment Conformance 3.5 Transformation Deployment Conformance 4 Behavior of Components (Normative) 4.1 Proxy Forwarding of Request 4.1.1 Applicable HTTP Methods 4.1.2 no-transform directive in Request 4.1.3 Treatment of Requesters that are not Web browsers 4.1.4 Serving Cached Responses 4.1.5 Alteration of HTTP Header Values In this section, the concept of "Web site" is used (rather t... 4.1.5.1 Content Tasting 4.1.5.2 Avoiding "Request Unacceptable" Responses 4.1.5.3 User Selection of Restructured Experience 4.1.5.4 Sequence of Requests 4.1.5.5 Original Headers 4.1.6 Additional HTTP Headers 4.1.6.1 Proxy Treatment of Via Header 4.2 Server Response to Proxy 4.2.1 Use of HTTP 406 Status 4.2.2 Server Origination of Cache-Control: no-transform Including a Cache-Control: no-transform directive can disrup... 4.2.3 Varying Representations 4.2.3.1 Use of Vary HTTP Header 4.2.3.2 Indication of Intended Presentation Media Type of Representation 4.3 Proxy Forwarding of Response to User Agent 4.3.1 Receipt of Cache-Control: no-transform 4.3.2 Receipt of Warning: 214 Transformation Applied 4.3.3 Server Rejection of HTTP Request 4.3.4 Receipt of Vary HTTP Header 4.3.5 Link to "handheld" Representation 4.3.6 Proxy Decision to Transform 4.3.6.1 Alteration of Response 4.3.6.2 HTTPS Link Re-writing 5 Testing (Normative) A References B Example Transformation Interactions (Non-Normative) B.1 Basic Content Tasting by Proxy B.2 Optimization based on Previous Server Interaction B.3 Optimization based on Previous Server Interaction, Server has Changed its Operation B.4 Server Response Indicating that this Representation is Intended for the Target Device B.5 Server Response Indicating that another Representation is Intended for the Target Device C Applicability to Transforming Solutions which are Out of Scope (Non-Normative) D Scope for Future Work (Non-Normative) D.1 POWDER D.2 link HTTP Header D.3 Sources of Device Information D.4 Inter Proxy Communication D.5 Amendment to and Refinement of HTTP E Administrative Arrangements (Non-Normative) F Acknowledgments (Non-Normative)
or

Refinement of the section concerned:

Status:

open proposal pending resolved_yes resolved_no resolved_partial other assigned to Nobody

Type: substantive editorial typo question general comment undefined

Resolution status:

Response drafted Resolution implemented Reply sent to commenter

Response status:

No response from Commenter yet Commenter approved disposition Commenter objected to disposition
Commenter's response (URI):

Comment:

1) Section 2.2.1:

The CTG distinguishes between retructuring, recoding and
optimization. This is a useful approach, and the distinction
could be used more systematically across the document. However,
without a formal definition of these terms, various parties
are left with too much leeway when classifying some operations
one or the other of the categories. This may entail inconsistencies
regarding the interpretation of the guidelines.

The guidelines should:
a) Define formally each of the three categories, possibly on
the basis of language theory. As an example, optimization seems
to be related to equivalent token streams (for textual content),
whereas recoding seems to deal with equivalent parse trees. Some
operations are reversible, others are not. The W3C is home to
technologies such as XSLT, so there should be competence there
to help ground definitions on solid formal concepts. Basing such
definitions on formal language theory is a suggestion, not a
requirement; other formally grounded definitions are possible.
b) Define exactly how to classify an operation that spans several
categories. As an example, converting HTML to XHTML while at the
same time eliminating comments and redundant white space should
amount to a recoding.

Related issues: (space separated ids)

WG Notes: See: http://www.w3.org/2008/09/16-bpwg-minutes#item04 Final resolutions: - Re LC-2050 move definitions to scope to clarify that we are talking only about restructuring - re LC-2050 we don't intend to define these concepts any more formally than we do now

Resolution: Final resolutions: - Re LC-2050 move definitions to scope to clarify that we are talking only about restructuring - re LC-2050 we don't intend to define these concepts any more formally than we do now

(Please make sure the resolution is adapted for public consumption)