PsychSpider ZPID

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Searching in fields

PsychSpider enables you to limit your search to certain attributes of a document. While indexing the crawled documents PsychSpider extracts zones and fields in documents so that they can be searched. Mime-Type, language, title, keywords, author or URL are such attributes which are kept in zones or fields, so that they become searchable.

To search these fields you can use the Parametric Index or use special search syntax. There is a major difference in the search syntax if the attribute is stored in a zone or in a field. Mime-Type and VLang (language) are fields. The used relational operator with this syntax is equal to (=). Be sure to enclose your search with double quotation marks if it contains spaces, otherwise the part after the space would not be treated as part of your field search.


Mime-Types or doktype is part of the Parametric Index. PsychSpider is able to reduce the generated hits to certain document types. If for example you want to have pdf-articles, you can use the following search option:


Field searches require an exact match of the query term to appear in the results list. The query mime-Type=pdf results in 0 hits, because the correct value is application/pdf and not only pdf.

Other possible values of mime-types are 'text/html', 'application/msword', 'OPAC Nachweis', 'PSYNDEX Doc', 'PSYNDEX Test Doc'


To get only hits in a certain language use 'VLang'. The correct value of this field is essential too. Language is encoded due to ISO 639 and ISO 639-1 language codes. The language is also presented in the Parametric Index. Example search:



Searches, which produces huge result lists, like VLang=en, normally result in the display of an error page, because PsychSpider is not able to generate the result page within few minutes.

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Additional Information

Tip of the week: Search Engines like PsychSpider follow links within documents to gather more documents. A document can only be found by the search engine, if a hyperlink exists or the search engine knows the exact URL. If you can't find a specific document (i.e. "Psychoanalyse im Wandel der Zeit"), but you know who has published it (i.e. Universität Trier), PsychSpider might help you to get a contact address, so you will be able to request the document via telephone, letter or E-Mail.

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