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<!--
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  * Ecological Metadata Language (EML) - Research context descriptors
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  *
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  *      Authors: Matt Jones, Zheng Wang, and Noah Goldstein
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  * Organization: National Center for Ecological Analysis and Synthesis
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  *  For Details: http://www.nceas.ucsb.edu/
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  *      Created: 1997 August 19
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  *     Modified: 1999 June 23
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  *      Version: 1.4
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  *    File Info: '$Id$'
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  *
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  * Ecological Metadata Language is a general purpose metadata content
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  * specification for documenting ecological data.  The specification
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  * consists of a series of modular document type definitions (DTD) that
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  * provide metadata content descriptors. It describes the owner and
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  * contents of the dataset  (eml-dataset.dtd), the research context in
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  * which it was created (eml-context.dtd), the structural
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  * characteristics of data files (eml-file.dtd), the
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  * characteristics of variables in a file (eml-variable.dtd), current
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  * status of data and metadata files (eml-status.dtd), access control
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  * rules regarding the data  and metadata (eml-access.dtd), software
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  * information (eml-software) and a variety of miscellaneous
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  * supplemental descriptors (eml-supplement.dtd).
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  *
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  * Files generated under the structural constraints of eml are
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  * plain-text files and therefore are editable in ordinary
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  * text-processors.  However, these DTDs are intended for use within
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  * general purpose metadata editors, and within a more specific
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  * metadata editor being developed at NCEAS for the ecological
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  * community.  This metadata editor will provide facilities for
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  * version control and efficient metadata entry.
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  * The purpose of this specification was to formalize the
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  * Michener et al. work in a structured language to examine its
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  * application to ecological data in a controlled manner.
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  *
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  * This specification was based on the work of the Ecological Society
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  * of America's Committee on the Future of Long Term Data, and more
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  * specifically on a related paper, Michener et al., 1997. See:
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  * Michener, William K., et al., 1997. Ecological Appications,
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  * "Nongeospatial metadata for the ecological sciences"
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  * Vol 7(1). pp. 330-342.
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  *
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  * Where appropriate, we have used elements of the ISO/TC 211 draft
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  * standard - the ISO Geographic information/Geomatics standard,
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  * which includes xml code, as well as ISO 8601 schema. Some elements
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  * in the ISO/TC 211 were expanded to allow for greater
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  * resolution.
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  *
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  * For an explanation of the classes of metadata and elements defined
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  * below, see Michener et al. 1997. In particular, the numbered comment
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  * labels found below refer to Table 1 (pp. 336-337) of Michener
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  * et al. 1997. In addition, each of the principal elements in the
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  * specification is accompanied by a FIXED attribute called "description"
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  * that provides a brief description of the content of the element. These
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  * descriptions are derived from Michener et al. 1997.
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  *
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-->
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<!--    *      *      *      *
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        CLASS II - RESEARCH ORIGIN DESCRIPTORS
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        *      *      *      *
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        -->
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<!-- Class 2-->
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<!ELEMENT eml-context (meta_file_id,research_project)>
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<!ATTLIST eml-context description CDATA #FIXED "Data set status and availabilty">
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<!ELEMENT meta_file_id (#PCDATA)>
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<!ATTLIST meta_file_id description CDATA #FIXED "Unique identifier of this metadata record">
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<!-- Class 2.A -->
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<!ELEMENT research_project (title, originator+, temporal_description*,
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		objectives?, abstract?, funding?, site_description*,
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	 	design_description*, methods_description*, staff*)>
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<!ATTLIST research_project description CDATA #FIXED "Overall project descriptors">
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<!ELEMENT title (#PCDATA)>
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<!ATTLIST title description CDATA #FIXED "Title or theme of data set">
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<!ELEMENT originator (party)>
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<!ATTLIST originator description CDATA #FIXED "Names and addresses of principal
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investigators">
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<!ELEMENT party ((party_individual | party_org), meta_address)>
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<!ATTLIST party description CDATA #FIXED "Responsible party information">
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<!ELEMENT party_individual (salutation*, given_name+, surname, job_title*)>
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<!ATTLIST party_individual description CDATA #FIXED "Full name of individual">
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<!ELEMENT salutation (#PCDATA)>
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<!ATTLIST salutation description CDATA #FIXED "Salutation">
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<!ELEMENT given_name (#PCDATA)>
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<!ATTLIST given_name description CDATA #FIXED "First name">
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<!ELEMENT surname (#PCDATA)>
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<!ATTLIST surname description CDATA #FIXED "Last Name">
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<!ELEMENT job_title (#PCDATA)>
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<!ATTLIST job_title description CDATA #FIXED "Job title">
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<!ELEMENT party_org (#PCDATA)>
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<!ATTLIST party_org description CDATA #FIXED "Name of organization">
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<!ELEMENT meta_address (address*, city?, admin_area*, postal_code?, country, resource_url*, email*, phone*, fax*, tdd_phone*)>
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<!ATTLIST meta_address description CDATA #FIXED "Contact information"
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                      meta_address_status (current|notcurrent) #REQUIRED
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                      meta_address_purpose (mail|institution|homeresidence) #REQUIRED>
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<!ELEMENT address (#PCDATA)>
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<!ATTLIST address description CDATA #FIXED "Street address">
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<!ELEMENT city (#PCDATA)>
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<!ATTLIST city description CDATA #FIXED "City">
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<!ELEMENT admin_area (#PCDATA)>
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<!ATTLIST admin_area description CDATA #FIXED "Administrative area (state, province, territory)">
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<!ELEMENT postal_code (#PCDATA)>
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<!ATTLIST postal_code description CDATA #FIXED "Postal code">
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<!ELEMENT country (#PCDATA)>
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<!ATTLIST country description CDATA #FIXED "Country">
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<!ELEMENT resource_url (#PCDATA)>
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<!ATTLIST resource_url description CDATA #FIXED "URL">
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<!ELEMENT email (#PCDATA)>
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<!ATTLIST email description CDATA #FIXED "Email address">
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<!ELEMENT phone (country_code?,area_code?,local_code, extension?)>
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<!ATTLIST phone description CDATA #FIXED "Phone number">
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<!ELEMENT fax (country_code?,area_code?,local_code)>
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<!ATTLIST fax description CDATA #FIXED "Facimilie telephone">
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<!ELEMENT tdd_phone (country_code?,area_code?,local_code)>
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<!ATTLIST tdd_phone description CDATA #FIXED "TDD/TTY telephone">
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<!ELEMENT country_code (#PCDATA)>
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<!ATTLIST country_code description CDATA #FIXED "Countrycode">
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<!ELEMENT area_code (#PCDATA)>
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<!ATTLIST area_code description CDATA #FIXED "Area code">
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<!ELEMENT local_code (#PCDATA)>
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<!ATTLIST local_code description CDATA #FIXED "Local phone code">
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<!ELEMENT extension (#PCDATA)>
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<!ATTLIST extension description CDATA #FIXED "Phone extension code">
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<!-- Class 2.A.1 - see Class 2.A -->
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<!-- Class 2.A.2 - see Class 2.A -->
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<!-- Class 2.A.3 -->
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<!ELEMENT temporal_description (temporal_coverage*, duration?)>
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<!ATTLIST temporal_description description CDATA #FIXED "General description of temporal coverage of project">
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<!ELEMENT temporal_coverage (start_date,stop_date?)>
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<!ATTLIST temporal_coverage description CDATA #FIXED "Temporal coverage">
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<!ELEMENT start_date (datetime)>
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<!ATTLIST start_date description CDATA #FIXED "Date data collection commenced">
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<!ELEMENT datetime (year?, month?, day?, hour?, minute?, second?, second_fraction?, time_zone_designator?)>
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<!ATTLIST datetime description CDATA #FIXED "Date and time as designated in ISO 8601">
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<!ELEMENT year (#PCDATA)>
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<!ATTLIST year description CDATA #FIXED "Year in YYYY format">
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<!ELEMENT month (#PCDATA)>
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<!ATTLIST month description CDATA #FIXED "Month in MM format">
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<!ELEMENT day (#PCDATA)>
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<!ATTLIST day description CDATA #FIXED "Day of month in DD format">
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<!ELEMENT hour (#PCDATA)>
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<!ATTLIST hour description CDATA #FIXED "Hour in hh">
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<!ELEMENT minute (#PCDATA)>
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<!ATTLIST minute description CDATA #FIXED "Minute in mm">
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<!ELEMENT second (#PCDATA)>
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<!ATTLIST second description CDATA #FIXED "Seconds in ss">
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<!ELEMENT second_fraction (#PCDATA)>
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<!ATTLIST second_fraction description CDATA #FIXED "One or more digits representing a decimal fraction of a second">
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<!ELEMENT time_zone_designator (#PCDATA)>
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<!ATTLIST time_zone_designator description CDATA #FIXED "Time zone designator">
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<!ELEMENT stop_date  (datetime)>
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<!ATTLIST stop_date description CDATA #FIXED "Date data collection terminated">
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<!ELEMENT duration (amount, unit)>
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<!ATTLIST duration description CDATA #FIXED "Duration of temporal coverage">
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<!ELEMENT amount (#PCDATA) >
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<!ATTLIST amount description CDATA #FIXED "Amount">
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<!ELEMENT unit (#PCDATA) >
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<!ATTLIST unit description CDATA #FIXED "Unit">
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<!-- Class 2.A.4 -->
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<!ELEMENT objectives (paragraph+) >
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<!ATTLIST objectives description CDATA #FIXED "Scope and purpose of research program">
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<!ELEMENT paragraph (#PCDATA)>
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<!ATTLIST paragraph description CDATA #FIXED "Paragraph of text">
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<!-- Class 2.A.5  -->
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<!ELEMENT abstract (paragraph+)>
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<!ATTLIST abstract description CDATA #FIXED "Descriptive abstract">
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<!-- Class 2.A.6 -->
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<!ELEMENT funding (paragraph+) >
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<!ATTLIST funding description CDATA #FIXED "Grant and contract numbers, names and addresses of funding sources">
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<!-- Class 2.B -->
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<!-- Class 2.B (subproject) has been assimilated to research project -->
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<!-- Class 2.B.1 -->
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<!ELEMENT site_description (paragraph*, sitetype?, geography?, habitat?, geology?, hydrology?, history?, climate?)>
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<!ATTLIST site_description description CDATA #FIXED "Site description">
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<!-- Class 2.B.1.a -->
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<!ELEMENT sitetype (paragraph+) >
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<!ATTLIST sitetype description CDATA #FIXED "Site type - description, e.g., short-grass prairie, blackwater stream, etc.">
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<!-- Class 2.B.1.b -->
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<!ELEMENT geography (coordinates*,paragraph*, citation*)>
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<!ATTLIST geography description CDATA #FIXED "Location and size">
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<!ELEMENT coordinates (lattitude, longitude) >
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<!ATTLIST coordinates description CDATA #FIXED "Cartesian Coordinates">
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<!ELEMENT lattitude (#PCDATA)>
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<!ATTLIST lattitude direction (north|south) #REQUIRED
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                    description CDATA #FIXED "Lattitude coordinates">
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<!ELEMENT longitude (#PCDATA)>
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<!ATTLIST longitude direction (east|west) #REQUIRED
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                    description CDATA #FIXED "Longitude coordinates">
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<!ELEMENT citation (author*, editor*, source_information?)>
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<!ATTLIST citation description CDATA #FIXED "Citation">
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<!ELEMENT author (party)>
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<!ATTLIST author description CDATA #FIXED "Author">
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<!ELEMENT editor (party)>
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<!ATTLIST editor description CDATA #FIXED "Editor">
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<!ELEMENT source_information    (title, vol?, issue?, pubdate?,
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                        publisher?, edition?, series?, chapter_title?,
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                        pages?, resource_url*)>
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<!ATTLIST source_information description CDATA #FIXED "Source information">
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<!ELEMENT vol (#PCDATA)>
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<!ATTLIST vol description CDATA #FIXED "Volume">
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<!ELEMENT issue (#PCDATA)>
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<!ATTLIST issue description CDATA #FIXED "Issue">
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<!ELEMENT pubdate (datetime)>
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<!ATTLIST pubdate description CDATA #FIXED "Date of publication">
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<!ELEMENT publisher (party)>
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<!ATTLIST publisher description CDATA #FIXED "Publisher">
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<!ELEMENT edition (#PCDATA)>
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<!ATTLIST edition description CDATA #FIXED "Edition">
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<!ELEMENT series  (#PCDATA)>
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<!ATTLIST series description CDATA #FIXED "Series">
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<!ELEMENT chapter_title (title)>
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<!ATTLIST chapter_title description CDATA #FIXED "Chapter title">
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<!ELEMENT pages (#PCDATA)>
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<!ATTLIST pages description CDATA #FIXED "Pages">
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<!-- Class 2.B.1.c -->
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<!ELEMENT habitat (paragraph*, citation*)>
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<!ATTLIST habitat description CDATA #FIXED "Detailed characteristics of habitat sampled">
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<!-- Class 2.B.1.d -->
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<!ELEMENT geology (paragraph*, citation*)>
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<!ATTLIST geology description CDATA #FIXED "Geology and Landform">
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<!-- Class 2.B.1.e -->
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<!ELEMENT hydrology (paragraph*, citation*)>
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<!ATTLIST hydrology description CDATA #FIXED "Hydrology">
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<!-- Class 2.B.1.f -->
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<!ELEMENT history (paragraph*, citation*)>
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<!ATTLIST history description CDATA #FIXED "Site history">
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<!-- Class 2.B.1.g -->
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<!ELEMENT climate (paragraph*, citation*)>
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<!ATTLIST climate description CDATA #FIXED "Site climatic characteristics">
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<!-- Class 2.B.2 -->
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<!ELEMENT design_description (designmethod?, plots?, sampling?,paragraph*, citation*)>
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<!ATTLIST design_description description CDATA #FIXED "Experimental or Sampling design">
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<!-- Class 2.B.2.a -->
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<!ELEMENT designmethod (paragraph*, citation*)>
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<!ATTLIST designmethod description CDATA #FIXED "Description of Statistical/sampling design">
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<!-- Class 2.B.2.b -->
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<!ELEMENT plots (paragraph*,citation*) >
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<!ATTLIST plots description CDATA #FIXED "Permanent plot description">
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<!-- Class 2.B.2.c -->
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<!ELEMENT sampling (temporal_coverage*, frequency?,paragraph*,citation*)>
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<!ATTLIST sampling description CDATA #FIXED "Information necessary to understand temporal sampling regime">
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<!ELEMENT frequency (#PCDATA)>
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<!ATTLIST frequency description CDATA #FIXED "Frequency or period of data collection">
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<!-- Class 2.B.3 -->
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<!ELEMENT methods_description (method*, instrument*, taxonomy*, permit*, legal_information*,paragraph*, citation*)>
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<!ATTLIST methods_description description CDATA #FIXED "Research Methods">
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<!-- Class 2.B.3.a -->
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<!ELEMENT method (paragraph*, citation*)>
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<!ATTLIST method description CDATA #FIXED "Description or reference to field/laboratory methods">
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<!-- Class 2.B.3.b -->
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<!ELEMENT instrument (paragraph*, citation*)>
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<!ATTLIST instrument description CDATA #FIXED "Description of Instruments used">
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<!-- Class 2.B.3.c -->
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<!ELEMENT taxonomy (paragraph*, citation*)>
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<!ATTLIST taxonomy description CDATA #FIXED "Taxonomy information">
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<!-- Class 2.B.3.d -->
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<!ELEMENT permit (paragraph+) >
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<!ATTLIST permit description CDATA #FIXED "References to pertinent scientific and collecting permits">
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<!-- Class 2.B.3.e -->
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<!ELEMENT legal_information (paragraph+)>
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<!ATTLIST legal_information description CDATA #FIXED "Relevant laws, decision criteria, compliance standards">
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<!-- Class 2.B.4 -->
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<!ELEMENT staff (party)>
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<!ATTLIST staff description CDATA #FIXED "Project Personell">
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<!-- End of file -->