cuthas.blogg.se - Search openlca data

#Search openlca data full
#Search openlca data professional

plus many specific terms like X in motion picturesįIAF International Index to Film Periodicals.One thing to watch out for: each database has its own controlled vocabulary for subjects. That will ensure the search results are really about that subject and don't just happen to mention those words in passing somehow. If one or more of them look like matches for your topic, re-run your search using those terms-and be sure to specify you want those terms in the subject field. Whenever you find a good article in a database, check out the subject headings. For example, Academic Search Complete uses the subject term "motion pictures," even if the article uses the words "films," "movies," or "cinema." The advantage of controlled subject terms is that they're standardized terms which will be assigned to all appropriate content no matter what terminology (or even language) is used by the author.

#Search openlca data professional

At their simplest they may be tags chosen by the authors, but most databases use a controlled vocabulary assigned by professional catalogers Subject headings are a form of descriptive metadata.

searching for words or phrases that have different meaning depending on context.

database content lacks abstracts or detailed subject headings.

searching for obscure terms which may be mentioned in the text without appearing in the abstract or title.

You'll get very different results searching "shakespeare" as an author or as a subject.Įven databases that can search full-text often have the option of limiting your search to just the metadata. The basic search typically searches all metadata fields, but there's usually an advanced search screen where you can select specific fields.Ĭhoosing the right search field can be crucial.

source: the title of the journal or book in which the article was published.

Common metadata fields for articles include: Your search words need to match words used in the metadata to get results.

Instead they have metadata, data about the data.

#Search openlca data full

Some databases do not actually contain the full text of articles. Example of search fields available in Academic Search Complete.