You can use these labels as search engine labels that run in the background or as refinement labels that your users can click for a different result set.
Custom Search comes with a number of pre-built labels that you can use in your refinements.
The following example uses the pre-built
shopping_comparisons label to promote
shopping comparison sites in search results.
<GoogleCustomizations> <CustomSearchEngine volunteers="false"> <Title>Product Review</Title> <Description>Compare products features</Description> <Context> <BackgroundLabels> <Label name="shopping_comparisons" mode="BOOST"/> </BackgroundLabels> </Context> </CustomSearchEngine> </GoogleCustomizations>
Not only can you use the pre-built labels, but you can also enhance them by
adding and removing sites from them. For example, if you find that some of
the pages that Google has labeled
shopping_comparisons are not shopping-comparison pages or that Google has missed some great shopping comparison
sites, you can add or remove those sites. You can improve the
shopping_comparisons label by adding the appropriate annotations in your search engine or in a collaborative search engine to which you have access.
Testing Search Labels
If you are not sure how a search label might work, you can experiment with it by using the
more: search operator in a custom search engine. Take the search label called
forum, for instance. Search for
cartoon on Google search. Open a new browser window and this time, type
more:forum cartoon in a custom search engine. Compare the search results between the normal search query and the search query appended with the
more: operator and a search label.
Note: Do not include a space between the
more: operator and the search label.
Pre-built Search Labels
The following sections list all the pre-built labels you can use.
- Creative Commons
- Computer and Games
- Health: Conditions
- Health: Drugs
- Health: Groups and Audience
- Health: Miscellaneous
- Health: Tests and Procedures
- News and Publication
- Shopping and Product Research
- Travel and Entertainment
You can have your search engine include only sites that have stated their Creative Commons license. Creative Commons copyright license indicates the rights that the creator wants to reserve and the rights they are willing to give away for the benefit of the community. Each label corresponds to a specific licensing term.
Note: You can use these labels with filter mode only. You cannot use them as boost or eliminate labels.
Computer and Games
Health: Groups and Audience
Health: Tests and Procedures
News and Publication
You can use the recency labels to promote results by the freshness of the webpages. The labels vary in how intensely they boosts new content.
The weakest label,
recent1, is best applied to search engines that search static content that is rarely updated, such as classic literature or archived reports. At the other extreme,
recent4 is best applied to search engines that search current content that is frequently updated, such as daily stock or market reports. It is the closest approximation to "sorting by date." The other two labels are somewhere in between.
|recent1||(static content that is updated rarely, such as annual reports, or archived documents)|
|recent2||(content that is updated approximately quarterly, such as reviews for bicycles)|
|recent3||(content that is updated approximately weekly or monthly, such as a magazine)|
|recent4||(current content that is updated daily, such as the news or comic strips)|
Shopping and Product Research
Travel and Entertainment