== Natural Language and Boolean Searching ==LexisNexis Academic (LNA) supports both Natural Language searching and searching with Boolean connectors. The default is for your search to run as a Natural Language search. If you enter any number of terms in the search box, LNA will imply an “and” between the terms and your search will return documents that contain both of those terms, appearing in any order and in any relationship with each other. Placing quotes around your terms will perform a search for an exact phrase – both terms have to appear in the document in that order.
LNA will default to performing a Boolean search if you use Boolean connectors with your search terms. The Boolean connectors recognized by LNA are listed below.
LNA will also default to a Boolean search if you limit your search to one or more segments within the document. Segments are the elements that contain information about the document and the publication in which it appears, for example, the author, the date the document was published, or the title of the publication. In order to limit your search to certain segments within a document, you can access the Advanced Options pane on any search form and select a segment from the Build Your Own Segment Search drop down. Also, LNA will recognize the following segments if you manually type them into any search box, without having to use the Advanced Options:* CITE (the citation for the document, e.g., 1 CFR 1)* HLEAD (headline and lead paragraph of a news document)* DATE (date of publication of the document)* NAME (e.g., a party in a case decision or an executive of a corporation)* AUTHOR (name of the creator of the document)Please note that if you perform a segment search, such as HLEAD(George Washington), without adding any Boolean connectors between your terms, LNA will treat your terms as an exact phrase – all terms in that order have to appear in that segment.
== Boolean Connectors ==
* AND: Both terms must appear in the document in any order* OR: Either term must appear in the document* W/n or /n: Terms must appear within stated number of characters of each other (e.g., W/5)* NOT W/n: Terms must not appear within stated number of characters of each other* PRE/n: The first term must appear before the second and within the stated number of characters* W/p or /p: Terms must appear within the same paragraph* W/seg: Terms must appear within the same segment* NOT W/seg: Terms must not appear together in the same segment* W/s or /s: Terms must appear within the same sentence* NOT W/s: Terms must not appear within the same sentence* AND NOT: The first term must be present in the document but the second term must not be present* ATLEAST#: The term must appear a minimum of the stated number of times (e.g., ATLEAST5)* ALLCAPS: Term must appear in all caps (e.g., NASA)* CAPS: Term must appear with a leading capital letter (e.g., a proper name)* NOCAPS: Term must appear with no capitalization* PLURAL: Term must appear in its plural form* SINGULAR: Term must appear in its singular form
== Natural Language and Boolean Searching: Understanding Your Results Set ==A Natural Language search in LNA will bring back up to 1,000 documents. If your search would result in over 1,000 documents, LNA will bring back the 1,000 most relevant documents, based on the search that you performed and the relevancy of the document to that search based on the presence and relationship of your terms in the document. A Boolean search in LNA will bring back up to 3,000 documents, but, if your search results would exceed 3,000 documents, then LNA will bring back only the 1,000 most relevant documents, as it would in a Natural Language search.
Within your results set, you can sort your results by Relevance or by Date/Source Order and filter your results by publication, publication type, subject, etc.
Please note that if your search results would exceed the document limit, your results set will be composed of the 1,000 most relevant documents and may not contain the most recent (by publication date) documents, if those documents fall below the relevancy threshold. If you are interested in finding the most relevant and the most recent documents, it is more effective to combine your search terms with a date restriction.
Please note that, in some cases, when you hit the results set limit, you may receive back slightly less than 1,000 documents. This is because LNA will never return more documents than the limits stated above and if you have a set of documents within your potential results set with the exact same relevancy ranking, all of those documents may be dropped from your results set if, in total, they would push your results over the document limit. For example, if your potential results set is 1,005 documents (in a Natural Language search) and 10 of those documents are exactly the same in terms of relevancy, your actual results set will be 995 documents.
== Other Search Features of LexisNexis Academic Home Page ==
'''Academic Search box:''' The Academic Search box is designed to provide an easy entry point into LNA and its wealth of diverse content. You can simply enter a series of terms and click the Search button and you will receive back a results set that provides a broad overview of the documents on LNA that meet your search criteria. With the Academic Search box, you do not need to select any sources to perform a search – LNA provides a set of default sources that include news, company information, state and federal cases, and law journals.
'''Hot Topics:''' The Hot Topics Links section of the LNA home page provides 10 pre-constructed news searches around recent or noteworthy issues. By clicking on one of these links, you will perform a search that will provide recent news coverage (usually within the last week or two) of the topic that you selected. Once you have received your initial results, you can edit that search (click on the “Edit Search” link) to add other search terms or to broaden the date range. Hot Topics change on a regular basis and suggestions for topics are always welcome.
'''Search Widgets:''' Below the Hot Topics Links are three guided search forms for searching the news, searching for a legal case, or accessing information on a particular company. These search forms can be expanded by clicking anywhere within the minimized box. These forms provide limited search and source selection options but are designed to provide a fast and efficient way to accomplish these popular research tasks.
== Searching on LexisNexis Academic: Advanced Options ==
If you want to make adjustments to the default Academic Search or want to construct your own search from scratch, access the Advanced Options by clicking on the arrow. The Advanced Options pane allows you to add a date or segment restriction to your search, select individual publications to search, or to refine your search using our SmartIndexing taxonomy.
'''Adding a Date Restriction:''' You can add a date restriction to your search by manually typing in dates in the From/To boxes (either a full date (01/01/01) or just a year (2013)) or by click on the calendar icon and choosing a date. You can also use the Select drop down to choose one of the following date ranges and LNA will fill in the appropriate numerical dates:* All available dates (this will be the default and will apply no date restriction to the search)* Date is today (restricts search to current date)* Previous week (restricts search to current date minus one week)* Previous month (restricts search to current date minus one month)* Previous year (restricts search to current date minus a year)* Previous two years (restricts search to current date minus two years)* Previous ten years (restricts search to current date minus ten years)
Please note that if you enter a date only in the From box, you will restrict your search to documents from that date to the current date. If you enter a date only in the To box, you will restrict your search to documents dated on or before that date.
'''Source Selection:''' You can use the Source Selection word wheel to find and select individual publications. Just start typing any word in the publication’s title and the Source Selection will narrow on publications that include that term/those terms. You can select multiple individual titles and continue to add or delete titles from the Source Selection as you construct your search. Please note that to access our full publications portfolio, including the larger group publication files, use the Find/Browse links at the top of the home page.
'''Index Terms:''' Each document that appears in LNA is indexed to the LexisNexis SmartIndexing taxonomy. This index creates a common vocabulary for searching across different publications, different kinds of publications, or across different countries – all of which may use different terms to describe the same thing or may use the same word to mean different things. The index terms can be particularly useful if you are trying to search for a specific use of a common term.
Once you have selected an index term or terms, you can apply a relevancy threshold to your index terms to ensure that the documents you receive in your search are the most relevant to the topic of interest. When you check this box, you are restricting your results to documents that are indexed to the terms that you chose and that have at least a 90% relevancy to those terms. This makes it more likely that the documents in your results set will be about your topic of interest rather than documents that simply mention your topic.
For a more detailed explanation of '''SmartIndexing''' and how it can be effectively used, please visit our SmartIndexing knowledge center:http://www.lexisnexis.com/infopro/resource-centers/product_resource_centers/b/smartindexing/default.aspx