Thanks a lot.
The idea is to add the fields included in the mertadata.opf file in the ePUB specification that we use to catalogue.
I enclose a real metadata file and I will follow all the fields in it. I hope that makes clear waht I need.
Fileds that already exist in your component will be labeled "ALREADY INCLUDED"
<author>Lois MCMASTER BUJOLD</author> ALREDY INCLUDED
<authorsort>MCMASTER BUJOLD Lois</authorsort>
TXT field defined as author name where we wrirte the name in the proper form to sort author's names
<isbn>9788440658357</isbn> ALREDY INCLUDED
<language>es</language> ALREDY INCLUDED
<cover>cover.jpg</cover> ALREDY INCLUDED
<originaltitle>Mirror Dance. A Vorkosigan Adventure</originaltitle>
TXT field identical to TITLE for the title in its original language
<serie>Miles Vorkosigan</serie>
<serienumber>2</serienumber>
pair of TXT and INTEGER fields related in which we document the series/collection and the order number of the book inside it.
Probably somehting simillar to actual PRICE field (quantity and currency fields) will do.
<translator>Margara Auerbach</translator>
TXT field with name of translator
<publisher>Ediciones B</publisher> ALREADY INCLUDED
<date>1995</date> AÑREADY INCLUDED
<revisedby>BBPP LARdT v1.14</revisedby>
TXT field with version of CSS template used in book. If it could came from listbox it would be great.
<review>Miles tiene 28 años.....en estado de criogenización.</review> ALREADY INCLUDED
<creationDate>2010-10-24</creationDate>
<modificationDate>2010-10-24</modificationDate>
2 DATE fields including the date of initial release y date of last release version of ePUB file
<award>HUGO</award>
<awardYear>1995</awardYear>
<logo>C:TodoEpubTodoEpubtmp@@@@logo128X128.png</logo>
If the book has an Award is included in its 2nd page
TXT name of award
INTEGER year of award
LOGO is similar to your icon image for categories field.
And thats all. Thanks again.