IEEE CSL Style, with trigraph and uppercase citation label

ieee-trigraph.csl

<?xml version="1.0" encoding="utf-8"?>
<style xmlns="http://purl.org/net/xbiblio/csl" class="in-text" version="1.0" demote-non-dropping-particle="sort-only">
   <info>
      <title>IEEE trigraph</title>
      <id>http://www.zotero.org/styles/ieee-trigraph</id>
      <link href="http://www.zotero.org/styles/ieee-trigraph" rel="self"/>
      <author>
         <name>Michael Berkowitz</name>
         <email>mberkowi@gmu.edu</email>
      </author>
      <contributor>
         <name>Julian Onions</name>
         <email>julian.onions@gmail.com</email>
      </contributor>
      <contributor>
         <name>Rintze Zelle</name>
         <uri>http://forums.zotero.org/account/831/</uri>
      </contributor>
      <contributor>
         <name>Stephen Frank</name>
         <uri>http://www.zotero.org/sfrank</uri>
      </contributor>
      <category field="engineering"/>
      <category field="generic-base"/>
      <category citation-format="numeric"/>
      <updated>2010-08-25T11:00:00+06:00</updated>
      <rights>
			This work is licensed under a Creative Commons Attribution-Share Alike 3.0 License:
			http://creativecommons.org/licenses/by-sa/3.0/
		</rights>
      <link href="http://www.ieee.org/portal/cms_docs_iportals/iportals/publications/authors/transjnl/stylemanual.pdf" rel="documentation"/>
      <link href="http://www.ieee.org/documents/auinfo07.pdf" rel="documentation"/>
   </info><!-- Macros -->
   <macro name="edition">
      <choose>
         <if type="bill book graphic legal_case motion_picture report song chapter paper-conference" match="any">
            <choose>
               <if is-numeric="edition">
                  <group delimiter=" ">
                     <number variable="edition" form="ordinal"/>
                     <text term="edition" form="short" suffix="." strip-periods="true"/>
                  </group>
               </if>
               <else>
                  <text variable="edition" text-case="capitalize-first" suffix="."/>
               </else>
            </choose>
         </if>
      </choose>
   </macro>
   <macro name="issued">
      <choose>
         <if type="article-journal">
            <date variable="issued">
               <date-part name="month" form="short" suffix=". " strip-periods="true"/>
               <date-part name="year" form="long"/>
            </date>
         </if>
         <else-if type="bill book graphic legal_case motion_picture report song thesis chapter paper-conference" match="any">
            <date variable="issued">
               <date-part name="year" form="long"/>
            </date>
         </else-if>
         <else>
            <date variable="issued">
               <date-part name="day" form="numeric-leading-zeros" suffix="-"/>
               <date-part name="month" form="short" suffix="-" strip-periods="true"/>
               <date-part name="year" form="long"/>
            </date>
         </else>
      </choose>
   </macro>
   <macro name="author">
      <names variable="author">
         <name initialize-with=". " delimiter=", " and="text"/>
         <label form="short" prefix=", " text-case="capitalize-first" suffix="." strip-periods="true"/>
         <substitute>
            <names variable="editor"/>
            <names variable="translator"/>
         </substitute>
      </names>
   </macro>
   <macro name="editor">
      <names variable="editor">
         <name initialize-with=". " delimiter=", " and="text"/>
         <label form="short" prefix=", " text-case="capitalize-first" suffix="." strip-periods="true"/>
      </names>
   </macro>
   <macro name="locators">
      <group delimiter=", ">
         <text macro="edition"/>
         <group delimiter=" ">
            <text term="volume" form="short" suffix="." strip-periods="true"/>
            <number variable="volume" form="numeric"/>
         </group>
         <group delimiter=" ">
            <number variable="number-of-volumes" form="numeric"/>
            <text term="volume" form="short" suffix="." plural="true" strip-periods="true"/>
         </group>
         <group delimiter=" ">
            <text term="issue" form="short" suffix="." strip-periods="true"/>
            <number variable="issue" form="numeric"/>
         </group>
      </group>
   </macro>
   <macro name="title">
      <choose>
         <if type="bill book graphic legal_case motion_picture report song" match="any">
            <text variable="title" font-style="italic"/>
         </if>
         <else>
            <text variable="title" quotes="true"/>
         </else>
      </choose>
   </macro>
   <macro name="publisher">
      <choose>
         <if type="bill book graphic legal_case motion_picture report song chapter paper-conference" match="any">
            <text variable="publisher-place" suffix=": "/>
            <text variable="publisher"/>
         </if>
         <else>
            <text variable="publisher"/>
         </else>
      </choose>
   </macro>
   <macro name="event">
      <choose>
         <if type="paper-conference">
            <choose><!-- Published Conference Paper -->
               <if variable="container-title">
                  <group delimiter=", ">
                     <text variable="container-title" prefix="in " font-style="italic"/>
                     <text variable="event-place"/>
                  </group>
               </if><!-- Unpublished Conference Paper -->
               <else>
                  <group delimiter=", ">
                     <text variable="event" prefix="presented at the "/>
                     <text variable="event-place"/>
                  </group>
               </else>
            </choose>
         </if>
      </choose>
   </macro>
   <macro name="access">
      <choose>
         <if type="webpage">
            <choose>
               <if variable="URL">
                  <group delimiter=". ">
                     <text value="[Online]"/>
                     <text variable="URL" prefix="Available: "/>
                     <group prefix="[" suffix="]">
                        <date variable="accessed" prefix="Accessed: ">
                           <date-part name="day" form="numeric-leading-zeros" suffix="-"/>
                           <date-part name="month" form="short" suffix="-" strip-periods="true"/>
                           <date-part name="year" form="long"/>
                        </date>
                     </group>
                  </group>
               </if>
            </choose>
         </if>
      </choose>
   </macro>
   <macro name="page">
      <group>
         <label variable="page" form="short" suffix=". " strip-periods="true"/>
         <text variable="page"/>
      </group>
   </macro><!-- Citation -->
  <citation et-al-min="3" et-al-use-first="1" et-al-subsequent-min="3"
    et-al-subsequent-use-first="1" disambiguate-add-year-suffix="true"
    disambiguate-add-names="false" disambiguate-add-givenname="false" collapse="year">
    <sort>
      <key variable="citation-label"/>
    </sort>
    <layout prefix="[" suffix="]" delimiter="; ">
      <group delimiter=", ">
        <text variable="citation-label" text-case="uppercase"/>
        <group>
		  <label variable="locator" form="short"/>
          <text variable="locator"/>
	    </group>
      </group>
    </layout>
  </citation><!-- Bibliography -->
   <bibliography et-al-min="7" et-al-use-first="1" entry-spacing="0" second-field-align="flush">
      <sort>
        <key variable="citation-label"/>
      </sort>
      <layout suffix="."><!-- Citation Number -->
         <text variable="citation-label" prefix="[" suffix="]" text-case="uppercase"/><!-- Author(s) -->
         <text macro="author" prefix=" " suffix=", "/><!-- Rest of Citation -->
         <choose><!-- Specific Formats -->
            <if type="article-journal">
               <group delimiter=", ">
                  <text macro="title"/>
                  <text variable="container-title" font-style="italic"/>
                  <text macro="locators"/>
                  <text macro="page"/>
                  <text macro="issued"/>
               </group>
            </if>
            <else-if type="paper-conference">
               <group delimiter=", ">
                  <text macro="title"/>
                  <text macro="event"/>
                  <text macro="issued"/>
                  <text macro="locators"/>
                  <text macro="page"/>
               </group>
            </else-if>
            <else-if type="thesis">
               <group delimiter=", ">
                  <text macro="title"/>
                  <text variable="genre"/>
                  <text macro="publisher"/>
                  <text macro="issued"/>
               </group>
            </else-if>
            <else-if type="webpage">
               <group delimiter=", " suffix=". ">
                  <text macro="title"/>
                  <text variable="container-title" font-style="italic"/>
                  <text macro="issued"/>
               </group>
               <text macro="access"/>
            </else-if>
            <else-if type="patent">
               <text macro="title" suffix=", "/>
               <text variable="number" prefix="U.S. Patent "/>
               <text macro="issued"/>
            </else-if><!-- Generic/Fallback Formats -->
            <else-if type="bill book graphic legal_case motion_picture report song" match="any">
               <group delimiter=", " suffix=". ">
                  <text macro="title"/>
                  <text macro="locators"/>
               </group>
               <group delimiter=", ">
                  <text macro="publisher"/>
                  <text macro="issued"/>
                  <text macro="page"/>
               </group>
            </else-if>
            <else-if type="article-journal article-magazine article-newspaper broadcast interview manuscript map patent personal_communication song speech thesis webpage" match="any">
               <group delimiter=", ">
                  <text macro="title"/>
                  <text variable="container-title" font-style="italic"/>
                  <text macro="locators"/>
                  <text macro="publisher"/>
                  <text macro="page"/>
                  <text macro="issued"/>
               </group>
            </else-if>
            <else-if type="chapter paper-conference" match="any">
               <group delimiter=", " suffix=", ">
                  <text macro="title"/>
                  <text variable="container-title" prefix="in " font-style="italic"/>
                  <text macro="locators"/>
               </group>
               <text macro="editor" suffix=" "/>
               <group delimiter=", ">
                  <text macro="publisher"/>
                  <text macro="issued"/>
                  <text macro="page"/>
               </group>
            </else-if>
            <else>
               <group delimiter=", " suffix=". ">
                  <text macro="title"/>
                  <text variable="container-title" font-style="italic"/>
                  <text macro="locators"/>
               </group>
               <group delimiter=", ">
                  <text macro="publisher"/>
                  <text macro="page"/>
                  <text macro="issued"/>
               </group>
            </else>
         </choose>
      </layout>
   </bibliography>
</style>

Marcelo,
I tried to used your csl style with pandoc version 1.9.4.2 as an input I took markdown and set the output to pdf. The bibliography is in .bib format.

But instead of citation I am getting:
[[CSL STYLE ERROR: reference with no printed form.]]

Any idea what I'm doing wrong?

Marcelo,
I tried to used your csl style with pandoc version 1.9.4.2 as an input I took markdown and set the output to pdf. The bibliography is in .bib format.

But instead of citation I am getting:
[[CSL STYLE ERROR: reference with no printed form.]]

Any idea what I'm doing wrong?

I am using your style with Mendeley. Exactly what I have been looking for, thanks a lot!

Thanks a lot for your contribution

Regards