Minutes of the June PWG XHTML-Print meeting


Hilton Portland, Portland, Oregon
June 24, 2002


I.	Introductions
II.	Review and Approve minutes from April 
III.	Review status of open issues and action items from minutes
    i)	CSS Attributes Proposal from Melinda and Elliot 
IV.	Review of xhtml version of the document 
V.	Discussion on Canon's request to reorganize the specification 
VI.	W3C Device Independent Working Group and its effect of XHTML-Print 
        (http://www.w3.org/2002/06/w3c-di-wg-charter-20020612.html note: section5.2.5)
VII.	New Issues
    i)	Using Multiple Style Sheets
VIII.	Adjourn


Jim Bigelow agreed to be the minute taker for the meeting.

Review of minutes from April meeting

Accepted as distributed

Review of XHTML Attributes categorization:

Melinda Grant and Elliot Bradshaw examined each of the relevant XHTML attributes and categorized them into:

Note: a revised version of the attribute-spread sheet was distributed the Friday before the meeting so participants had not had time to review it. A discussion of some of the attributes marked "optional" occurred with the understanding that the committee would discuss and decide how all the attributes should be handled in subsequent meetings:


action, cols, enctype, method, rows, tabindex, <select size> Consideration of this attribute and others directly related to supporting the Basic Forms module showed some difficulties with printing a representation of a form. Printing a blank form or a form containing the default values is not difficult. The problem comes up when considering a use case where users would like to fill out a form and print it, as filled out, for a record or confirmation of a transaction. XHTML-Print support for this use case is not possible within the specification of XHTML-Print constructs since the data entered into the form by the user is not part of the language, rather it is a separate data stream.
The entity presenting the form can avoid the problem by presenting an information page integrating the user's data and the form.
Melinda Grant suggested that only minimal support for printing a blank form be mandated in the language since there is no method within the language to merge the user data and the form.
Jacob Refstrup suggested that the user data and form could be transmitted to the printer in a multi-part/multiplexed data stream in a manner similar to the transmission of inline data.
Charset The suggestion is this attribute is optional since UTF-8 handles character set specification. The manner that a conforming printer handles this attribute is implementation dependent.
Classid & codetype The suggestion is one attribute is supported they must both be supported.
Declare Support for this attribute is optional since low memory device any not be able to honor the intent of attribute to store the image for later reference.
Src Make jpeg baseline the minimum requirement
Valign The rationale for suggesting this be optional was not available during the discussion, in its absence the suggestion is to make it required.

Review of xhtml version of the document

Canon's request to reorganize the specification

There were two parts to the proposal to restructure the specification:

  1. The intent to specify XHTML-Print as a composition of four components: 1) a base element spec, 2) a base style spec, 3) and additional style spec, and 4) image rotation; and
  2. EXIF markers in the image are not the way to indicate the orientation of the image on the page.

The discussion of how to organize the specification can be summarized as follows:

The discussion of how to specify an image's orientation can be paraphrased as follows:

W3C Device Independent Working Group and its effect on XHTML-Print

The mission of the W3C Device Independent Working Group is to study issues related to authoring, adaptation and presentation of Web content and applications that can be delivered effectively through different access mechanisms. The group's charter (Section 5.2.5 Printer related groups) names the PWG XHTML-Print committee as the body responsible for the definition of print markup (XHTML-Print) and printer capability descriptions.

Using Multiple Style Sheets

The link element can be used to include one or more style sheets in a document. Depending on the attributes within the link element the style sheet:

The consensus is that:

  1. Link elements referencing style sheets for media other than print, e.g., screen should be ignored.
  2. The use of alternate style sheets is discouraged and a conforming printer's response to alternate style sheets is implementation dependent.
  3. If there is a set of alternate style sheets that are not ignored by rule 1 above, and a preferred style sheet exists, the preferred sheet will be used and the remainder of the alternate sheets ignored. If multiple preferred sheets exist, the first one encountered will be used.

Action Item: Jim Bigelow will write a paragraph for the XHTML-Print specification dealing with multiple style sheets in a document.

Work on running page headers and footers and CSS level 2.1

Jacob Refstrup is attending CSS meetings and reports that:

  1. The model for specifying running headers and footers is changing. The previous model allowed the side margin boxes to overlap the header and footer margin boxes so that text in the boxes could overlap. The new model is similar to a table row and will avoid overlapping area. Jacob Refstrup is the lead editor for the new proposal that will be presented at the next CSS meeting in late August.
  2. Work on a CSS 2.1 specification is on-going. CSS 2.1 does not contain the @page rule since w3c candidate recommendations must be testable and @page cannot be tested at the time. Therefore, the @page rule will be moved to CSS Level 3 (AKA current work)

XSL Formatting Objects and XHTML-Print

XSL (eXtensible Stylesheet Language) is a markup language for formatting material to media such as a page. XSL contains 51 formatting objects and 231 properties for configuring the formatting objects.

Harry Lewis called for a consideration of the relationship of XSL formatting objects and XHTML-Print. The consensus was that XSL is too complex for low cost printers to implement.

Future work and directions for the CSS portion of the XHTML-Print specification

Melinda Grant called for a consideration of how to deal with the CSS material now in the XHTML-Print specification since it is not complete. The discussion evolved into a consideration of the structure of the XHTML-Print specification and ended with the proposal that the specification be broken into the following separate documents:

The first two documents, CSS Print Profile and XHTML Print, could be the responsibility of the w3c. The last document, "XHTML + CSS: A Profile for Printing," would be the responsibility of the PWG.

Action Item: Jacob Refstrup will write the first draft of "CSS Print Profile." Don Wright will write drafts of the other two documents: "XHTML Print" and "XHTML + CSS: A Profile for Printing"

Conversion of the XHTML-Print DTD to an XML Schema

Work is continuing with the conversion w3c documents to an XML schema. When the conversion is complete, the DTD can also be easily converted.

Future Meetings:

August 26-30, Santa Fe, NM.
November 4-8, New Orleans, LA
January 2003, Hawaii