Ovid is now delivering key medical, nursing, and pharmacy texts from a variety of publishers to clinicians' desktops, through Books@Ovid. Books@Ovid offers the complete text of these sources in a highly interlinked and easily navigated graphical interface, giving quick access to crucial diagnostic, research, and reference information.
Books@Ovid includes the full text, references, updates, and graphics from some of the most respected sources in medicine, nursing, and pharmacology. A searcher can choose to run a search in one text, selected texts, or all texts. Color diagrams, charts, and other textbook illustrations are available as thumbnails or full-sized graphics. Information about the currently available textbooks is available in alphabetical order or listed by Subject.
When users select Books@Ovid from Ovid's database menu, they will find that its search environment is different from other Ovid databases. (For detailed searching information, see the online Help available during searches. For details on specific textbook environments and special features, see the section on that textbook, below.) Single-frame or multiple-frame environments contain the retrieved text. Buttons bars on the top and side of the screen provide navigational buttons, links to the search page, and access to Help. Search screens provide links to Home, Logoff, Help, and the main Ovid database screen. If the user is accessing a specific textbook, links are available to the text's Table of Contents and Index and to the Search and Results screens, making it easier for searchers to jump from one book section to another. Textbooks generally have an alphabetized index of all book topics, making it easier for users to locate and jump to specific terms.
See http://www.ovid.com for the latest information on textbook availability.
Therapeutic class | Contraindications |
Drug name | Warnings |
Product table | Precautions |
Warning box | Drug interaction |
Actions | Adverse reactions |
Indications | Administration and dosage |
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Although the Books@Ovid textbooks are selected from the database menu just like any other database available in Ovid Web Gateway, the search environment in which they reside has a different look and feel than other Ovid databases. For an overview of the ways in which Books@Ovid differ, review the following table.
Function | Ovid | Books@Ovid |
Default Boolean Operator | ADJ (meaning Adjacency); creates a more focused search set. | OR; creates a broader search set. When using Books@Ovid's Exact Match feature, OR becomes ADJ. |
Stopwords
Stopwords are terms that are not indexed, and are ignored when encountered in a search string. For example, if "of" were a stopword, then "quality of life" would be searched as "quality adj life". |
Ovid has approximately 156 stopwords. Most are also used as stopwords in Books@Ovid. Ovid does not index terms that are stopwords, and ignores them in a search string. | Books@Ovid has 216 stopwords. Books@Ovid does not index terms that are stopwords, and ignores them in a search string. |
Search Stemming | There is no equivalent function in Ovid. | Stemming in Books@Ovid is used to search for variants of a search term, and is enabled as the default. For example, the query term mold retrieves mold, molding, and molded. Searchers can disable stemming by using wildcard characters that force the search engine to search exact matches of the query term. |
Search History | Results of the user's search history are maintained on the main search page and are exploded by using the Expand Search tab. Search histories can also be saved temporarily (for 24 hours) or permanently. | Only the current search can be retrieved, by clicking on the Results button. |
Exact Search Match String | Quotation marks force the search engine to search terms exactly as entered (minus stopwords). | Instead of quotation marks, Books@Ovid uses the Match Query Phrase function. In the interface, searchers can check the "Exact Match Only" box to have an exact search match. On the command line, searchers can use single quotation marks around search term strings to produce the same results. |
Default Search Fields | Database specific. | In
all Books@Ovid texts except Drug Facts and Comparisons the default
search fields are title, text, author, table, figure captions, and references.
This corresponds to the All Fields Checked option.
In Drug Facts and Comparisons, the default fields are Tables, Actions, Indications, Contraindications, Warnings/Precautions, Drug Interactions, Adverse Reactions, Overdosage, Patients Information, and Administration/Dosage (again, the All Fields Checked option). |
Default Display Fields | Database specific. However, most displays contain title, author, and source fields. | Book title, chapter name, and relevance score (expressed as a percentage). Hits are listed in order of relevancy ranking. |
Thesaurus | Enabled by default for all databases that support this function. Searchers use the command "thes" or use Tools to enter a term and retrieve broader, narrower, or related terms. | Not available in Books@Ovid. |
Results Display Order | Displays in chronological order, most recent first. | Uses
relevance ranking. This is based on:
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Find Similar | Not implemented in Ovid. | The Query by Example feature uses the top relevance-ranked terms from the document as the query, performing a search to find similar documents. |
Both Ovid and Books@Ovid use Boolean operators. Again, however, the way they use them differs significantly in some ways.
Boolean Operator | Ovid | Books@Ovid |
AND | Retrieves citations only if they contain all query terms. | The same. |
OR | Retrieves all citations containing either of the query terms, with duplicates eliminated. | Books@Ovid' default setting. Retrieves all citations containing either of the query terms. |
NOT | Retrieves documents that contain the first query term but specifically exclude the second query term. Example: health reform NOT health maintenance organizations. | The same. |
ADJ | Ovid's default setting. Assumes adjacency and inserts the ADJ operator. Query terms are retrieved in a specific order, excluding stopwords. | No equivalent. However, the Match Exact Query assumes adjacency. |
FREQ | Specifies a threshold of occurrence. For example, "blood pressure.tx/freq=10" retrieves only documents in which the phrase "blood pressure" occurs 10 or more times in the specified field (in this example, full text). | No equivalent. |