ST EK List:
3.2.1G Metadata is data about data.
3.2.1H Metadata can be descriptive data about an image, a Web page, or other complex objects.
3.2.1I Metadata can increase the effective use of data or data sets by providing additional information about various aspects of that data.
7.3.1G Privacy and security concerns arise in the development and use of computational systems and artifacts.
7.3.1H Aggregation of information, such as geolocation, cookies, and browsing history, raises privacy and security concerns.
7.3.1J Technology enables the collection, use, and exploitation of information about, by, and for individuals, groups, and institutions.
Metadata
On this page, you will learn about and practice answering questions about metadata.
Data can even include data about itself. For example, a music file might contain data describing the song title, artist, album, genre, record label, etc. Or an image file might include data for the date that the picture was taken, the location where it was taken, information about the camera settings, etc. This kind of information about data is called metadata. Metadata can be useful when working with data because it tells you additional information about the data you are working with.
Because metadata is often not displayed by software, it's easy to violate privacy without realizing it when posting data online. Click the links below to see short excerpts from
Blown to Bits about:
These questions about metadata are similar to those you will see on the AP CSP exam.
A new mobile phone company—unbeknownst to its customers—periodically records random snippets of their conversations and considers the recordings as data. In addition, it collects the following metadata on the conversations:
The start and end time of the conversation
The phone numbers of the users in the conversation
The GPS locations of the users in the conversation
For which of the following goals would it be more useful to analyze the data instead of the metadata?
To determine if any of its users was present at the time and place of a crime.
For this purpose, GPS and time information (in the metadata) would be more useful.
To determine the time of day the app is used most frequently in a certain geographic location.
For this purpose, GPS and time information (in the metadata) would be more useful.
To determine the language most commonly used in user conversations.
Correct. For this purpose, the conversation data itself would be analyzed.
To determine the most active users of the app for a given year.
For this purpose, user phone numbers and time information (in the metadata) would be more useful.
Which of the following is not an example of metadata?
Data about a digital image describing the size of the image, image resolution, color depth, and when the image was created.
This is an example of data about data.
Data about a text document containing information about the length of the document, its author, the date the document was written, and a short summary of the content.
This is an example of data about data.
Data about a pack of wolves describing their habitat, hunting habits, diet, and sleep cycles.
Correct. Data about wolves is not data about data.
Data within a web page containing a description of page content and a list of key words linked to the content.
