ELM databases for beginners
LeAnn Suchy, Metronet
Visible versus Invisible Web
“VisibleWeb” (often called “Surface
Stuff you find via search engines like
Google,Yahoo, Bing, etc.
“InvisibleWeb” (often called
“HiddenWeb” or “DeepWeb”)
Things not searchable by regular search
Think subscription databases
Last year Google indexed its
trillionth webpage (1 trillion unique
This is only half of theVisibleWeb
Results are relevancy ranked
Over 200 factors determine relevancy
Popularity is a large factor
Relevancy rankings aren’t always credible
InvisibleWeb is anywhere from 100
to 500 times bigger than theVisible
Web (or even bigger?)
Includes more credible sources
Search engines like Google can’t
index the InvisibleWeb because:
Items found via a query
How do I find Invisible Web?
Database through the government,
libraries and state of MN
Databases through your school
Today we’re focusing on: ELM
databases (ELM = Electronic Library
Almost 50 ELM databases
More databases available through
your school, so talk to your media
And now, think like a librarian…
Before recommending, explore
Ask these questions of the database:
What type of content is provided?
How many publications are included?Years?
How frequently is it updated?
What navigational tools are provided?
Are there tutorials? A help section? Search tips?
How are search results displayed?
Can I save, email or print articles? RSS feeds?
Which students would best be served by this?
These questions and more are on
Database Exploration Checklist
Between now and our meeting
Check out the Database Exploration
Go into the ELM databases (or
databases linked from your school
library) and use the worksheet to
analyze a couple databases
Blog about your experiences
When we meet in-person: Bring an
assignment with you where you had to
have students research something