DLI Workshop -- Mar Hosted by Dalhousie University March 2000 DLI Training Workshop

DLI Workshop -- Mar Review data service models within the framework of:  access and dissemination  aggregate data and microdata  statistics versus data Data Service Models

DLI Workshop -- Mar

4 Data Service Models Models were presented as a continuum during the 1997 DLI workshop “Order & Pass- through” Service Install Data and Provide Access Treat as a Collection and Provide Reference

DLI Workshop -- Mar Data Service Models Choose a model that matches your staff and computing resources

DLI Workshop -- Mar Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data

DLI Workshop -- Mar Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data

DLI Workshop -- Mar Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data

DLI Workshop -- Mar Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data

DLI Workshop -- Mar Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data

DLI Workshop -- Mar Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data

DLI Workshop -- Mar Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Acquisition Fill a Request Locate data Order data & documentation Collection Development Select & Locate data Order data & documentation Catalogue data & documentation Install & Store (data & documentation) Reference Search for data Interpret documentation Retrieve or download data Process data change formats subset cases or variables aggregate cases merge files analyze data Find a referral partner on campus

DLI Workshop -- Mar

DLI Workshop -- Mar The Inventory Model In the traditional inventory model, roughly half of the support goes to putting items on the shelf, while the other half goes to finding and getting the items off the shelf. Source: Darlene Fichter

DLI Workshop -- Mar The Access Model With the access model, support is split between getting information into a deliverable state and finding appropriate ways of retrieving and disseminating the information.

DLI Workshop -- Mar Access/Dissemination Issues managing vendor licenses  are the license conditions realistic?  what type of identification or authentication is required?

DLI Workshop -- Mar Access/Dissemination Issues matching products with technology  is the product dependent on a specific operating system?  is the product software dependent?

DLI Workshop -- Mar Access/Dissemination Issues determining access methods  stand-alone, lan or wan?  what are the finding tools?

DLI Workshop -- Mar Access/Dissemination Issues determining dissemination options  what are the output formats?  does the output require special storage considerations?

DLI Workshop -- Mar The Access Model These issues and others about access and dissemination will continue in our discussions.

DLI Workshop -- Mar

DLI Workshop -- Mar Data Types  In the 1997 DLI workshop time was spent discussing differences between aggregate data and microdata.  Each type has an impact on data access models.

DLI Workshop -- Mar Aggregate Data  Aggregate data consist of statistical summaries derived from original data collections and organized in tables according to the following properties: socio-economic phenomena spatial representation time

DLI Workshop -- Mar Aggregate Data  Statistical summaries these summaries take the form of counts, totals, sums, averages or percentages

DLI Workshop -- Mar Age and Sex are displayed Spatial representation and Time are fixed Cells contain counts

DLI Workshop -- Mar Spatial representation and Age are fixed Year and Sex are displayed

DLI Workshop -- Mar Geography and Sex are displayed Age and Time are fixed

DLI Workshop -- Mar Aggregate Data  Aggregate data products usually stored as a series of related tables in some type of database structure requiring special retrieval software (examples from STC include C86, C91, CBP, CANSIM, etc.)

DLI Workshop -- Mar Microdata  Microdata are usually anonymised records of actual respondents from a survey unsummarized, i.e, observations in the form in which the data were collected in a raw format requiring some form of processing, typically a flat ASCII file

Microdata: Cases 3 & 4 from the GSS 2 Main File

Microdata: First 14 Cases from the GSS 2 Episode File

DLI Workshop -- Mar Impact on Data Access  Aggregate data have been processed and organized in a database structure must locate the table with desired data must deal with each database structure must deal with accompanying retrieval software

DLI Workshop -- Mar Impact on Data Access  Microdata data must be processed or subset for subsequent processing must identify desired variables and cases (data documentation) must deal with the raw data file structure must address the issue of desired formats

DLI Workshop -- Mar Impact on Data Access These and others differences between aggregate data and microdata will be part of our discussions about data access, also.

DLI Workshop -- Mar

DLI Workshop -- Mar Statistics versus Data  The term statistics is commonly used to describe the numeric summaries, such as counts, totals, sums and averages, that people use to make a point in a study or report.

DLI Workshop -- Mar Statistics versus Data  The term data refers to numeric files containing a collection of raw information with many observations that can be analyzed from a variety of perspectives.

DLI Workshop -- Mar Statistics versus Data  Typically, generalizations are drawn from analyses of a data file.  The information provided by all of the individuals in a survey is considered to be data, while the percent of respondents in a survey with a university degree is a statistic.

DLI Workshop -- Mar Blurring Statistics and Data  In the print world, statistical information is usually found in statistical abstracts, census monographs and serial publications by government agencies.

DLI Workshop -- Mar Blurring Statistics and Data  In the digital world this numeric information is now appearing with electronic table access on CD-ROM, the Internet, or in electronic journals.  Many aggregate data products now fall in this category.

DLI Workshop -- Mar Blurring Statistics and Data  In other instances, the responses in the microdata file of a survey may provide the answer to a statistical question. For example, the percentage of the population in Canada with high blood pressure may be determined from the National Population Health Survey.

DLI Workshop -- Mar Impact on Data Access The use of aggregate data products and microdata files to answer statistical questions will also contribute to our discussions about data access.

DLI Workshop -- Mar

DLI Workshop -- Mar Context for Aggregate Data The motivation to simplify access to aggregate data products exists because of their utility in answering general statistics questions. The demand for facts and figures at the reference desk steadily increases.

DLI Workshop -- Mar Aggregate Data Challenges The challenges of creating access to aggregate data were summarized earlier.  how to find the table with the desired statistics  how to deal with each database structure  how to cope with the retrieval software

DLI Workshop -- Mar DLI Aggregate Data Sources Four major DLI aggregate data sources have been chosen for this workshop.

DLI Workshop -- Mar DLI Aggregate Data Sources CANSIM is a major source for economic data and social data reported over time.

DLI Workshop -- Mar DLI Aggregate Data Sources E-STAT is a popular resource for simple access to selected CANSIM series and some aggregate data sources viewed useful in teaching.

DLI Workshop -- Mar DLI Aggregate Data Sources The 1996 Census aggregate data products are a valuable collection of electronic tables.

DLI Workshop -- Mar DLI Aggregate Data Sources The Health Indicators Database is a compilation of tables from several sources to provide a single-access tool about health status in Canada.

DLI Workshop -- Mar  Hands-on work with aggregate data CANSIM E-STAT Census ‘96 Health Indicators Database