JIG could be the acronym for joint interest group and the phrase could be referring to a specific value in a software program. Perhaps the program is in a standardised form as based upon the group's recommendation.

Similarly, in Stephen Pendleton's example of a PubSub service that shows people's location, there might be an "application" field in the form with value "locator" and clients might just want to subscribe to meta-node messages that concerned nodes that had the application="locator" value.
http://mail.jabber.org/pipermail/standards/2003-July/003801....

FDT technology 'picks up where DDL leaves off'
by FDT **Joint Interest Group (JIG) **
A response to Emerson Process Management from the FDT (Field Device Tool) Joint Interest Group, challenging Emerson's view that enhanced DDL offers a better solution than FDT/DTM.
http://www2.theiet.org/oncomms/sector/computing/Articles/Obj...

Acronyms and Initials Index
Used in Instrumentation, Controls and on the Net
Readout acknowledges the list published by the The Institute of Measurement and Control in the Instrument Engineer's Yearbook which forms the original basis for this list.

JIG Joint interest group

http://read-out.net/signpost/cl.html

Style Text Locator Attribute Tag
ATSUI uses text-locator information to determine where to break text and which options to apply to text breaks. The attribute value associated with this tag (TextBreakLocatorRef) contains the data needed by ATSUI to locate various kinds of text breaks. You can set and retrieve the style text locator value using the following style attribute tag:
Attribute tag: kATSUStyleTextLocatorTag
Data type: TextBreakLocatorRef (an opaque structure defined in Unicode Utilities)
Default value: NULL
Comment: The default **value** specifies to use the region-derived locator or the default Text Utilities locator.
http://developer.apple.com/documentation/Carbon/Conceptual/A...

Automation.com
FDT Joint Interest Group News Read about the latest news, products, mergers, and acquisitions in the automation, process control, and instrumentation industries for FDT **Joint Interest Group.**
https://www.automation.com/sitepages/pid1495.php

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Note added at 2 hrs (2007-09-03 19:43:14 GMT)
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C’est aussi possible que ce n’est qu’un gabarit.

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Note added at 1 day2 hrs (2007-09-04 19:37:17 GMT)
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•Elément Locator
Il n’est pas considéré comme ressource, il n’est ni l’origine ni la cible d’un arc, mais il
permet d’identifier une ressource distante. Il a les attributs suivants :
type : obligatoire est il prend **la valeur ‘locator’**
href : représente la valeur de l’URL de la cible.
label : c’est le nom qui sera manipulé par l’élément arc.
title : allouer une étiquette à la ressource.
role : déterminer le rôle de la ressource.
http://heberge.univ-tlemcen.dz/~proinfo2/PFE/memoires/SAN.pd...

jig - posage /place de montage /gabarit
http://membres.lycos.fr/jcviel/BTS/dico_1.txt

[54] METHOD OF MANUFACTURING PELLICLE AND PELLICLE MANUFACTURING JIG
[54] PROCEDE DE PRODUCTION DE PELLICULE ET GABARIT CORRESPONDANT
http://www.ic.gc.ca/cipo/patgazarc.nsf/v_arcedition_f/09-21-...$File/natlo.pdf?OpenElement

Un élément XHTML est conforme à XLink :
1. s'il a un attribut type issu de l'espace de nommage XLink dont la valeur est l'une parmi "simple", "extended", "locator", "arc", "resource", "title" ou "none", and
2. et s'il adhère aux contraintes de conformité imposées par le type de l'élément XLink choisi, telles qu'elles sont décrites dans cette spécification.
http://www.yoyodesign.org/doc/w3c/xlink/