Here is an example of what the 2.8 version data files are (the SGML format ones):
<!DOCTYPE VCESI PUBLIC "-//Volvo Construction Equipment//DTD VCESI03//EN"[
]>
<VCESI lang="GB"><PRODUCT-SPECIFIC><SERVINFOTYPE><INTRO-PARTINFO><SERVINFO><TITLE>Preface</TITLE><SUBTITLE>EXCAVATOR VOLVO EC210</SUBTITLE><PARA><PTXT><EMPH ETYPE="BOLD">BASIC MACHINE</EMPH></PTXT><PTXT>PROD NO DD00A001 EC210</PTXT></PARA><PARA><PTXT><EMPH ETYPE="BOLD">ENGINE</EMPH></PTXT><PTXT>Part No. 1111-00013 Typ, B 5,9 - C</PTXT><PTXT>Part No. 1111-00313 Typ, B 5,9 - C for tropics</PTXT></PARA><PARA><PTXT><EMPH ETYPE="BOLD">BUCKETS</EMPH></PTXT><PTXT>Bucket GP. ESCO. 0,86/0,95 - F24</PTXT><PTXT>Description:</PTXT></PARA><TABLE FRAME="NONE"><?Pub Dtl><TGROUP COLS="3" COLSEP="0" ROWSEP="0" ALIGN="LEFT" CHAROFF="50" CHAR=""><COLSPEC COLNUM="1" COLNAME="SQCOLUMN1" COLWIDTH="0.88in"><COLSPEC COLNUM="2" COLNAME="SQCOLUMN2" COLWIDTH="0.40in"><COLSPEC COLNUM="3" COLNAME="COL3" COLWIDTH="4.21in" COLSEP="0"><TBODY VALIGN="TOP"><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>GP</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>General purpose. (RB)= Rock bucket.</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>ESCO</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Type of bucket tooth, Esco.</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>0,86</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Volume CECE cubic meter.</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>0,95</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Volume SAE cubic meter.</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>S1</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Quick fit bucket.</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>F24</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Direct-mounted (pin-on) bucket.</PTXT></ENTRY></ROW></TBODY></TGROUP></TABLE><PARA><PTXT><EMPH ETYPE="BOLD">TRACK ASSEMBLY</EMPH></PTXT><PTXT>Track TRK 600SR X 49</PTXT><PTXT>Description:</PTXT></PARA><TABLE FRAME="NONE"><?Pub Dtl><TGROUP COLS="3" COLSEP="0" ROWSEP="0" ALIGN="LEFT" CHAROFF="50" CHAR=""><COLSPEC COLNUM="1" COLNAME="SQCOLUMN1" COLWIDTH="0.88in"><COLSPEC COLNUM="2" COLNAME="SQCOLUMN2" COLWIDTH="0.40in"><COLSPEC COLNUM="3" COLNAME="COL3" COLWIDTH="4.21in" COLSEP="0"><TBODY VALIGN="TOP"><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>TRK</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT> Track</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>600</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Width of track</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>S</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Symmetrical track</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>R</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Clearing hole</PTXT></ENTRY></ROW><ROW><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>49</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="RIGHT"><PTXT>=</PTXT></ENTRY><ENTRY MOREROWS="0" ROTATE="0" VALIGN="TOP" ALIGN="LEFT"><PTXT>Number of track shoes</PTXT></ENTRY></ROW></TBODY></TGROUP></TABLE></SERVINFO></INTRO-PARTINFO></SERVINFOTYPE></PRODUCT-SPECIFIC></VCESI>
Here is a version 4.0 of a different file, for which they use XML now:
<?xml version='1.0' ?><?xml-stylesheet href='..\..\..\stylesheet\vcesi03.xsl' type='text/xsl'?><!DOCTYPE vcesi [ <!NOTATION TIFF SYSTEM ''><!NOTATION CGM SYSTEM ''><!NOTATION BMP SYSTEM ''><!NOTATION WMF SYSTEM ''><!NOTATION GIF SYSTEM ''><!NOTATION JPG SYSTEM ''><!NOTATION PNG SYSTEM ''><!NOTATION SGML SYSTEM ''><!NOTATION XML SYSTEM ''>]><vcesi><product-specific><servcatype servcatnbr=''><title></title><servcat2 servcatnbr='' servcatcomp='VCE'><title></title><servcat3 servcatnbr='' servcatcomp='VCE'><title></title><servinfotype><intro-partinfo><servinfo><title>Foreword</title><subtitle>This catalogue lists the spare parts for attachments for
construction equipment, bearing the name Volvo and Volvo BM/Michigan
with the following designations:</subtitle><para><ptxt><emph>WHEEL LOADERS: Volvo BM / Michigan</emph></ptxt><ptxt>L30</ptxt><ptxt>L50, L50B</ptxt><ptxt>L70, L70B</ptxt><ptxt>L90, L90B</ptxt><ptxt>L120, L120B</ptxt><ptxt>L150</ptxt><ptxt>L160</ptxt><ptxt>L180</ptxt></para><para><ptxt><emph>WHEEL LOADERS: Volvo / Volvo BM</emph></ptxt><ptxt>L50C, L50D</ptxt><ptxt>L60E</ptxt><ptxt>L70C, L70D, L70E</ptxt><ptxt>L90C, L90D, L90E</ptxt><ptxt>L110E</ptxt><ptxt>L120C, L120D, L120E</ptxt><ptxt>L150C, L150D, L150E</ptxt><ptxt> L180C, L180D, L180E</ptxt><ptxt>L220D, L220E</ptxt></para><para><ptxt><emph>EXCAVATOR LOADERS: Volvo BM</emph></ptxt><ptxt>EL70, EL70C</ptxt></para></servinfo></intro-partinfo></servinfotype></servcat3></servcat2></servcatype></product-specific></vcesi>
Both files are part of an interactive parts catalog; I don't see any descriptions of an XML Xchema, nor is there any descriptions of the XML files it looks for. Thx, RaduGB