We demonstrate a web-based full-text search engine. Search through articles related to the SoilCarbonHack project and provided by the TUM Chair of Soil Science. Search for keywords, titles, authors, journals, or any text you are interested in. The search engine is highly scalable and extracts all information from raw PDF files. The displayed metadata corresponds to the DOI of the article. It may be empty for old (before 2000) publications with no or very unusual DOIs, but the search will still work and deliver a valid result in the form of the filename. Note that while we do not provide direct download of the files, we link directly to the corresponding page. Following, you find some information on how to search and example queries.
Here we briefly introduce searching and which patterns can be used with examples. For more information, please refer to the official Xapian documentation on queries.
Boolean keywords such as AND NOT OR are supported. These must be specified using CAPITAL LETTERS and you can combine these expressions into parenthesis. You can also use the shorthand +/- notation popularized by Google. The plus sign (+) prepended directly to a keyword tells Xapian that all results must contain that keyword. The minus sign (-) tells Xapian to exclude results that contain that keyword.
Return documents containing at least one keyword:
soil carbon
soil OR carbon
Return documents containing both keywords:
+soil +carbon
soil AND carbon
Return documents containing one keyword but not the other:
+soil -carbon
soil NOT carbon
Use parentheses to group expressions:
(soil OR stone) AND carbon
Enclose your phrase in quotation marks for exact phrases, proper names and adjacency queries.:
"soil carbon storage"
Capitalize names:
Einstein
Match documents that have words in close proximity:
soil NEAR carbon