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<!--
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       '$RCSfile$'
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       Copyright: 2000 Regents of the University of California and the
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                  National Center for Ecological Analysis and Synthesis
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     For Details: http://knb.ecoinformatics.org/
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        '$Author$'
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          '$Date$'
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      '$Revision$'
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    This program is free software; you can redistribute it and/or modify
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    it under the terms of the GNU General Public License as published by
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    the Free Software Foundation; either version 2 of the License, or
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    (at your option) any later version.
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    This program is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with this program; if not, write to the Free Software
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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-->
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<!-- The root element represents a list of allow or deny records for
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       principals that should be either allowed or denied access to a resource. -->
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<!ELEMENT acl (identifier+, (allow | deny)+)>
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<!ATTLIST acl
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  authSystem CDATA #REQUIRED
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  order (allowFirst | denyFirst) "allowFirst"
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>
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<!-- The authentication system that this access file uses -->
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<!-- The order in which the rules should be applied for this object -->
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<!-- The public read access to this object -->
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<!ELEMENT identifier (#PCDATA)>
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<!ATTLIST identifier
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  system CDATA #IMPLIED
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>
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<!-- an allow rule adds the listed permission for a particular principal -->
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<!ELEMENT allow (principal+, permission+, duration?, ticketCount?)>
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<!-- a deny rule removes the listed permission for a particular principal -->
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<!ELEMENT deny (principal+, permission+, duration?, ticketCount?)>
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<!-- the user/group in the authentication system to whom this rule applies -->
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<!ELEMENT principal (#PCDATA)>
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<!-- the permission to be allowed or denied (read/write/all) -->
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<!ELEMENT permission (#PCDATA)>
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<!-- the duration of the permission -->
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<!ELEMENT temporalCov (sngdate | mdattim | rngdates)>
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<!ELEMENT caldate (#PCDATA)>
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<!ELEMENT time (#PCDATA)>
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<!ELEMENT begdate (#PCDATA)>
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<!ELEMENT begtime (#PCDATA)>
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<!ELEMENT enddate (#PCDATA)>
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<!ELEMENT endtime (#PCDATA)>
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<!ELEMENT mdattim (sngdate+)>
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<!ELEMENT rngdates (begdate, begtime?, enddate, endtime?)>
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<!ELEMENT sngdate (caldate, time?) >
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<!ELEMENT duration (temporalCov)>
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<!-- the number of accesses allowed by this rule if access is granted -->
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<!ELEMENT ticketCount (#PCDATA)>
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<!-- EOF -->