The Source Type Catalog organizes the entries in the ForestryGuide database according to the formal classification of the resources ("source types"). There are four main categories:

1. Information Providers/Servers
2. Factual Reference Works
3. Bibliographic Resources
4. Primary Information Sources

Typically, resources in this group do not contain information per se. Rather, they serve as a gateway or point of entry for further research.
Sources Type Key Description
Libraries lb Major subject-specific libraries with significant and relevant scholarly holdings in particular areas. (Subject-specific collections are categorized as Bibliographic Sources).
Archives ar Subject-specific archives with relevant collections of primary documents.
Museums ar Subject-specific museums and their collections. (Individual collections categorized as Primary Information Sources).
University Departments sf1 Entries in this category point to the homepages of university departments. Links are not onto specific sections or to particular information offered through these sites, but on the homepages in general as starting points or points of entry into the server´s informational supply. Sites classified with this key typically include information on academic and/or educational matters such as course and degree programs.
Research Institutes sf2 "Pure" research institutes, university-affiliated or not. While the department key above characterizes sites with a significant educational content, this category is used for the homepages of institutes which mainly offer information on high-level (i.e. beyond undergraduate) research, with findings and information primarily addressed to other scholars in the field. Examples would be independent research institutes or think tanks.
Organizations and Societies so1 Homepages of organizations and organizational units. Examples would be academic associations, non-profit organizations, and other non-governmental organizations.
Official Governmental Server so2 Servers of all branches of government on international, national, regional, or local levels (ranging, e.g., from the UN to official servers of individual communities or localities). Not included are servers of institutions which may be initiated or funded by but are not officially part of government.
Commercial Providers sc Commercial providers with a subject-specific focus. Typical entries in this category would be publishers or companies presenting themselves and/or their product and service portfolio on the internet.
Scientific Publishers sc1 These subcategories are used in some Guides to further subdivide the group of Commercial Providers
Booksellers sc2
Instruments, Equipment, Software Providers sc3
Exploration Companies sc4
Communication Forums dg Various discussion groups, news groups, news lists, and mailing lists available on the internet. Addresses typically lead to the starting point of individual subject-specific communication forums, e.g. sites where one can subscribe to mailing lists or from which one can enter into an ongoing discussion.
Other etc-info Residual category: accommodates the sites which cannot be classified as any of the above, but nevertheless entail a sufficient amount of relevant information to justify their indexation. Examples would be well-maintained private homepages noteworthy for their overall offering.
This section includes those resources which provide direct factual references. In contrast to the resources classified under the section above, the user will be directly lead to specific sources.
Sources Type Key Description
General Encyclopedia and Biographic Lexicons ej Encyclopedia (typically characterized by a broad and in-depth treatment of issues, eventually stretched over several volumes or entries), and biographical directories.
Specific Encyclopedias ej1 Encyclopedia devoted to a specific subject
Bibliographic Encyclopedias ej2
Dictionaries, Thesauri we Subject-specific dictionaries (languages, technical, etc.) and thesauri.
Lists of Abbreviations ak Subject-specific lists of abbreviations.
Gazetteers oe Directories of places, historic or geographical.
Addresses and Personnel Directories ay This category covers address lists in their varying formats. Included are personnel directories and member lists as well as address lists of institutions. Entries in this category can also be in the format of a linklist, where the links are the actual addresses.
Data Collections d6 Resources which offer „hard" data. Depending on the respective discipline, these can be genuine data bases, statistics, chronologies, etc.
Compendiums of Laws gs Legal provisions of all sorts. Collections of natural, physical, etc. laws do not belong here.
Norms and Standards tm Normative documents which do not have the formal status of laws. Typical examples would be ISO or DIN standards.
Manuals a2 Technical manuals, didactic manuals (e.g. for writing techniques, presentation methods, publication procedures, etc.), and other „how to" materials.
(Current) Research Projects fp Research projects, research networks, or particularly significant individual projects. Examples would be the German SFBs (Sonderforschungsbereiche).
Other etc-fact The residual category for this section.
In this section, the various bibliographic sources are grouped. In contrast to the entries in other sections, the user may also be directed to linklists.
Sources Type Key Description
Virtual Libraries ff Major individual virtual libraries, usually with a broad in scope.
Special Subject Virtual Libraries is Virtual libraries focussing on specific issues and /or of smaller scope.
Author-Specific Sites au Sites devoted to individual authors.
Bibliographic and Abstracting Services blz6 Major or continuously maintained, renewed, or updated bibliographic series, including review and abstract series.
Bibliographies of Special Subjects bl Bibliographies devoted to specific subjects.
Bibliographies by Specific Document Type Linklists to providers of various document types. They are unusual in that they are among the few cases in SSG-FI´s formal key system where pure linklists already existing elsewhere and provided by others are also incorporated.
Lists of Periodicals/Journals vcz6
Lists of Source Materialss vcq6 Used in the Anglistik Guide only
Lists of Primary Literature vcq61
Lists of Secondary Literature vcq62
Lists of Conference Proceedings vckn
Lists of Government Reports vcbd
Lists of Research Reports vcfd
Lists of Theses and Dissertations vcho
Lists of Standard Specifications vctm
Lists of Translation Indexes vcue
Other Lists vcan Residual category: Lists of other document-specific resources e.g. software, databases
Subject-Specific Library Catalogs kb  
Other etc-bib Residual category: other bibliographic resources
This group comprises resources which feature primary information.
Sources Type Key Description
Personal Homepage ph Sites provided by individual researchers about their own work.
Teaching Materials le Resources that have an explicit educational focus and/or intent, such as textbooks, lecture notes, or introductions into certain topics.
Handbooks hb General and structured treatise on a subject or an issue.
Journals z6 Periodically published resources, mainly journals. Actual bredth of information available differs between individual journals, ranging from only very basic information to tables of contents to full content.
Journals with Full Articles z61 Used in some Guides to differentiate between journals with differnt availability
Journals with Selected Articles z62
Journals with Abstarcts z63
Journals with Titles z64
Journals in the Early Development z65
Series of Preprints, Reports, and Working Papers fd Various formats of advance publications and so called „grey literature", referred to as preprints, working papers, etc. (depending on the academic discipline). Typically, this leads to series of thematically or institutionally related documents, not to the individual documents themselves.
Congresses kn Material related to congresses (mainly academic), which also appear in the format of conferences, symposia, annual meetings. Sites typically include basic information on these congresses, sometimes also conference proceedings.
Source Materials q6 Sources which can differ greatly from one discipline to the other. Overall, it refers to the materials which form the very basics of research. This key is awarded independently of the actual data format (e.g. a scanned historical handwriting that is provided in the form of an image file).
Primary Texts q61 Original sources.
Secondary Texts q62 Sources for the evaluation of primary sources.
Maps, Lists of Map Collections ka Thematically closely related map sets or important single maps are classified. Sites spanning map collections on a range of issues are classified as Bibliographic Source (see above).
(Collections of) Pictures, Photos bb Primary information sources where graphics are the dominant feature. Typically, one would find collections of thematically related graphics, but major or particularly important individual graphics (e.g. large interactive maps) are also included.
Moving Pictures mp Sources with animated graphics (moving pictures). In the area of offline resources, this would also include videos and films.
Virtual Exhibitions at Online Exhibits, typically displaying at least some artefacts and explanatory texts.
Software and Expert Systems do Subject-specific software and expert systems are united. Software in this context can be downloadable or for online-use only.
Other etc-prim Residual category: other andere resources featuring primary information.

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