XForms Essentials
by Micah Dubinko

This errata page lists errors outstanding in the most recent printing.

If you have technical questions or error reports, you can send them to
booktech@oreilly.com.  Please specify the printing date of your copy.

This page was updated March 17, 2006.

Here's a key to the markup:
	[page-number]: serious technical mistake
	{page-number}: minor technical mistake
	<page-number>: important language/formatting problem
	(page-number): language change or minor formatting problem
	?page-number?: reader question or request for clarification



Confirmed errors:


(19)  Epigraphs (both);
The epigraph attributes, if you look closely, have both a typographical (M-dash, I
think) and a shorter hyphen. Should be just the typograpical dash.

---Pearl Bailey
---David Weinberger


(39)  within Figure 3-1;
xml:lang="eng" should be xml:lang="en"


{57}  Last line in section "count-non-empty()";
The example given will return NaN rather than a numeric value as printed.

sum(/operands/operand) div count-non-empty(/operands/operand)

The correct XPath to use is:
sum(/operands/operand[string-length(normalize-space(.))>0])
count-non-empty(/operands/operand)

There should be a WARNING:
As specified in XPath, sum() cannot handle blank nodes, which return
NaN. A special predicate test such as the one shown here must be used.
Note that XPath 2.0, still a draft as of this writing, fixes this
deficiency.


(102)  3rd section in example;
The ">" is missing between "label" and "<xforms:itemset". The line wrap is also a
little awkward, but it's OK.

The lines

  <xforms:label>Send a copy to the following email addresses</xforms:
          label<xforms:itemset nodeset="email" model="list_items">

should be

  <xforms:label>Send a copy to the following email addresses</xforms:label>
  <xforms:itemset nodeset="email" model="list_items">


(112)  middle of page, code block;
example is missing ev:event attributes on an <insert> and two consecutive <setvalue>
elements.

should be
...
<setvalue ev:event="DOMActivate" ref= ...
<setvalue ev:event="DOMActivate" ref= ...
<setvalue ev:event="DOMActivate" ref= ...

Also, the first <setvalue> has a closing tag of </quantity>. 
Obviously, it should be </setvalue>


(115)  within Figure 7-1;
<xforms::input> should be <xforms:input>


(115)  2nd sentence from bottom of page;
the word "change" in the parenthesis should be "chance".


[123]  middle of page, 3rd line from bottom of example;
The name 'lineset' is incorrect. It should be 'repeat_id'.

That is,

<setvalue ref="/order/items/item[index('lineset')]/@price"/>

should be

<setvalue ref="/order/items/item[index('repeat_id')]/@price"/>


{145}  2nd code sample (one liner);
includenamespacesprefixes="" should be
includenamespaceprefixes=""

('namespace' isn't plural)


(150)  table 8-1;
inlcudenamespaceprefixes 
should be: 
includenamespaceprefixes 

(transpose l/c)


(151)  within Table 8-1;
last entry in table: "multipart-port" should be "multipart-post"

Throughout the table, all 'curly quotes' should be 'straight quotes'


(152)  Example 9-1;
The namespace declaration is wrong, containing a trailing slash

This:
@namespace xforms url(http://www.w3.org/2002/xforms/)

Should be this:
@namespace xforms url(http://www.w3.org/2002/xforms)


[171]  Concatenating a Currency Symbol example;
The example shows the calculate expression as:

calculate="if( starts-with(E, '?'), ., concat( '?',E  ))"
it should be:
calculate="if( starts-with( ., 'E'), ., concat( 'E', . ))"
NOTE: E = EURO Symbol, couldn't get it to render properly


(175)  3rd paragraph (just after 2nd code block);
typo - the word grandchild should be entirely in fixed font, not just 'child'

In HTMLspeak, it currently is grand<code>child</code>, but it should be
<code>grandchild</code>