<descriptor thcode="2"><thesaurus thcode="2" name="USGS Thesaurus" scope="Topics and methods of scientific study carried out by USGS, with product types, scientific disciplines, geologic time, and types of institutional structure and activities.  Broad and shallow, used to help people find scientific information." creator="U.S. Geological Survey" rights="Public domain" edition="2.0" date="2020-01-09" codetype="number" prefix="topic" uri="https://www2.usgs.gov/science/USGSThesaurus" tblname="term" nonpref="nonpref" relterm="relterm" root_code="1" contact="pschweitzer"><category><term thcode="25" code="29" name="distinct labels" parent="26" scope="Preferred labels (descriptor texts) are distinct within the thesaurus. A concept can be specified either by its unique identifier (code) or by the text of its descriptor."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="21" name="disciplines" parent="2" scope="Broad categories of human inquiry or activity, such as scientific disciplines."/><term thcode="25" code="20" name="methods" parent="2" scope="Actions taken to obtain or analyze information"/><term thcode="25" code="19" name="organizational functions" parent="2" scope="Things that organizations do, typically including various types of programs, projects, and services."/><term thcode="25" code="7" name="temporal" parent="2" scope="Terms indicate periods of time, such as chronostratigraphic units, named historical periods or intervals surrounding known historical events, or seasons."/><term thcode="25" code="5" name="theme" parent="2" scope="Terms indicate domains of human concern, such as scientific discipline, societal problems, or characteristics of earth, space, oceans, and living things."/><term thcode="25" code="29" name="distinct labels" parent="26" scope="Preferred labels (descriptor texts) are distinct within the thesaurus. A concept can be specified either by its unique identifier (code) or by the text of its descriptor."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="21" name="disciplines" parent="2" scope="Broad categories of human inquiry or activity, such as scientific disciplines."/><term thcode="25" code="20" name="methods" parent="2" scope="Actions taken to obtain or analyze information"/><term thcode="25" code="19" name="organizational functions" parent="2" scope="Things that organizations do, typically including various types of programs, projects, and services."/><term thcode="25" code="7" name="temporal" parent="2" scope="Terms indicate periods of time, such as chronostratigraphic units, named historical periods or intervals surrounding known historical events, or seasons."/><term thcode="25" code="5" name="theme" parent="2" scope="Terms indicate domains of human concern, such as scientific discipline, societal problems, or characteristics of earth, space, oceans, and living things."/></category><altlabel><altlabel>USGSThesaurus</altlabel><altlabel>USGSThesaurus</altlabel></altlabel></thesaurus><term thcode="2" code="277" name="reports" parent="808" scope="Written items, especially those that are official, factual, or informative, often including graphics as well as text."/><uf><usefor name="abstracts"/><usefor name="articles (publications)"/><usefor name="biographies"/><usefor name="books and book chapters"/><usefor name="dissertations"/><usefor name="documents"/><usefor name="guidelines"/><usefor name="journal articles"/><usefor name="journals"/><usefor name="memos"/><usefor name="newsletters"/><usefor name="pamphlets, brochures, and booklets"/><usefor name="papers (publications)"/><usefor name="planning reports"/><usefor name="proceedings"/><usefor name="published series"/><usefor name="scientific reports"/><usefor name="serial publications"/><usefor name="technical reports"/><usefor name="text documents"/><usefor name="theses"/><usefor name="transcripts"/><usefor name="workshop reports"/><usefor name="yearbooks"/></uf><bt><term thcode="2" code="808" name="product types" parent="1" scope="General representation of the information in a resource, such as a map or data set."/><term thcode="2" code="1" name="Categories" scope="Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."/></bt><nt><term thcode="2" code="152" name="checklists" parent="277" scope="Inventories or lists of related items for checking off or reference."/><term thcode="2" code="1754" name="conference proceedings" parent="277" scope="Collections of abstracts or papers given during a specific meeting, conference, or workshop."/><term thcode="2" code="519" name="guidebooks" parent="277" scope="Books intended to direct and instruct travelers in a given area and often geared to special interests, such as observing local birds, understanding geological features, or locating endemic plants."/><term thcode="2" code="691" name="manuals" parent="277" scope="Documents giving instructions on using specified equipment or accomplishing specified tasks."/><term thcode="2" code="1099" name="standards" parent="277" scope="An object or instrument of known properties used as a model, for comparison, or a set of rules used to assure quality."/><term thcode="2" code="1755" name="strategic plans" parent="277" scope="Documents describing overall strategy, not presenting substantive scientific findings."/></nt><rt><term thcode="2" code="87" name="bibliographies" parent="148" scope="List of publications on a given topic, by an author or group, or published in a specific time period. Limited here to lists primarily of paper documents."/><term thcode="2" code="148" name="catalogs and indexes" parent="808" scope="Detailed enumeration of related items listed in a given order, or alphabetical lists of topics used for information retrieval."/><term thcode="2" code="263" name="directories" parent="148" scope="Searchable lists of people, typically USGS staff."/><term thcode="2" code="913" name="policies and regulations" parent="1349" scope="Rules, orders, and procedures issued by organizations or governments for administrative, controlling, and managing purposes."/></rt></descriptor>