ZedAI DTBook Conversion

Could someone post an example of an acceptable way to represent an image with both 
alternate text and a long description?  For example, would this work?

<object src="myimage.png" desc="image-desc-01"> <p>A sunset at the beach</p> </object>
<description id="image-desc-01">
   <p>The sky is pink, the sun low in the sky, there are three birds on the shore, the tide 
      is low, and the sun is about to set.</p>
</description>

Where object/p is the alt text and description is the long desc.

Or do you think it's preferable to put both as direct children of object?

In DTBook, @title is one of the core attributes.  It is described as "advisory title or
amplification of the element " [1]. 

I don't see any equivalent in ZedAI.

Is there a way to express image height and width? 
I don't see any attributes or @role values.

When going from dtbook:pagenum to zedai:pagebreak, there does not seem to be a translation
for @page=front|normal|special.  I also don't see anything in the pagination vocabulary.

When going from dtbook:a to zedai:ref, the following attributes need to be mapped (or agreed to be dropped):

 * @type (a mime type)
 * @hreflang (langcode for the href target)
 * @accesskey
 * @tabindex

Both dtbook:blockquote and dtbook:q have an optional attribute @cite, which contains a URI.  In ZedAI, the equivalent element for both blockquote and q is quote.  It can have a child citation element, which must be non-empty, and which may contain @xlink:href.  How to express the original @cite attribute?  E.g.:

DTBook source example:
<q cite="http://example.org/an-internet-comment-thread">This product is the best ever!</q>

ZedAI possibility:

<quote>This product is the best ever! <citation xlink:href="http://example.org/an-internet-comment-thread">http://example.org/an-internet-comment-thread</citation></quote>

Looking for the appropriate ZedAI equivalents for these attributes

* <table>: @summary @frame @rules
* <td> @abbr @axis
* <th> @axis

dtb:annotation has no @ref but zedai:annotation (phrase variant) requires it

Here is a question about DTBook's address element, which has no like element in ZedAI.  
What role would you give it?  Would you say that "publisher-address" is accurate or 
not even close?  In the DAISY 3 structure guidelines [1], dtbook:address is described as:

"The address element may be used by authors to supply contact information for a 
document or a major part of a document such as a form."

And in ZedAI, the "publisher-address" vocabulary term [2] is given as:

"The publisher's address, which can be abbreviated to city and postal code only."

They don't necessarily seem equivalent, but then again, the description for 
publisher-address is not very elaborate

Is there an equivalent of dtbook:br?  zedai:transition does not seem appropriate for inline use, and a line break isn't a pagebreak either.

Here is a sample DTBook use case, taken from the [http://www.daisy.org/z3986/structure/SG-DAISY3/part2-inline.html#br structure guidelines entry for br]:

<p>Now, listen to the rhythm as you say the poem again (da = short 
    beat; dum =  stressed beat). Here is the beat: </p>
<p>da dum da/ da dum da /da dum (3 feet)<br/> 
    da dum da /da dum da /da dum (3 feet)<br/> 
    da dum da /da dum (2 feet)<br/> 
    da dum da /da dum (2 feet)<br/> 
    da dum da /da dum da /da dum (3 feet)</p>

In the structure guidelines [1], it says 
"A byline contains information about the creator of or contributor to a work, 
usually consisting of more than just an author's name. ". 

In ZedAI, there is no identical element, so I would use zedai:p, which is fairly neutral.  
I looked at the available @role values, and found that "contributor" was maybe the 
closest thing.  There is also "byline" in the articles vocabulary, but I am concentrating 
on books, so I wasn't planning on using this vocabulary.  Do you think that ZedAI 
<p role="contributor"> sounds reasonable for DTBook <byline> or would you use a 
different approach?

In DTBook, a poem or cite element may have a child element "author". 
Would you use DC metadata and RDFa to express this in ZedAI?

1. dtbook:docauthor becomes zedai:p @property="dc:author"

We are not sure whether to use @property or @role. 
If we use dublin core, does that imply that we should also use RDFa?

2. dtbook:doctitle becomes zedai:h @role="title" or zedai:h @property="dc:title"

Similar issue as above

3. dtbook:covertitle becomes zedai:block @role="covertitle"

<p property="author">Charles Darwin</p>

<quote xml:id="q1">
   <p>...</p>
   <citation about="#q1"><name property="author">Charles Darwin</name>, 
         <span property="title">On the Origin of Species</span></citation>
</quote>

<cover>
   <frontcover>
        <block role="covertitle">
            <ln><name>Charles Darwin</name></ln>
            <ln>Die Entstehung der Arten</ln>
        </block>
   </frontcover>
</cover>

As far as I can tell, the element dtbook:dateline has no ZedAI element or role equivalent. 
Is this intended to be handled in a particular way, i.e. via RDFa / dcterms 'date'?

<p>Dated <time value="1858-01-12">January 12, 1858</time></p>

<p><span role="dateline">NEW YORK (AP)</span> ...</p>

DTBook has special markup for mentioning keyboard keys, e.g.

<p>To copy the selection to the clipboard, press <kbd>CTRL+C</kbd>.</p>

There is no direct ZedAI equivalent, but <code> seems like the closest match. 
From its description [1]: 

"intended for general instances of code as found in works of fiction and similar
non-technical documents, which includes computer programming code, commands and 
command input/output"

Are keyboard keys considered command input?  Could I write this in ZedAI?

<p>To copy the selection to the clipboard, press <code>CTRL+C</code></p>

For dtbook:samp, do you think zedai:p @role="practice" is a good translation?  

To recap, dtbook:samp is defined as [1] "A sample of work created by the author used 
as an example or template within the text."

And zedai @role="practice" is [2]: "A review exercise or sample"

In everyday language, I wouldn't think that the terms meant the same thing.
However, the definitions seem to overlap.

<block role=”example”>
   <p>...</p>
</block>

If you have a DTBook element with @render= optional | required, what would you call it in ZedAI? 
I don't see anything about skippability in the spec/schema doc/vocab.