Completeness
- Total number of records
- Total number of attributes
- Percentage of non-empty values
- Number/percentage of non-empty values for each attribute
Data Quality checker
Data Quality checker is a customizable solution allowing to automatically get insights into quality of data based on consistency rules covering the following data quality dimensions:
Completeness Correctness Formatting Ranging Non-duplication Language detection Spelling URL Accessibility Image Analysis Document File Analysis
Data Quality checker can be customized either as a standalone tool or a component integrated into existing data processing workflow.
The customization may include not only modifications to the existing consistency rules but also the creation of new ones as well as support for various data formats, volume of data, interfaces, API and transfer protocols.
Use Cases
After data entry
After data scraping
After data export
Before data import
Before and after
deduplication
Before and after
data cleansing
Before and after
data merge
Before and after
data enrichment
Consistency rules
Completeness
Correctness by data type
Correctness by data type
- Numeric
- Boolean
- Date
- String
Formatting
Formatting
- Validity of email address
- Validity of URL
- Validity of phone number
- Validity of postal address
- Validity of date and time
- Validity of HTML
Numeric ranging
Numeric ranging
- Number/percentage of 0 values
- Minimal, maximal and average values
- Number of records with [minimal, minimal + DELTA), (maximal - DELTA, maximal] and (average - DELTA, average + DELTA) values
- Number of records in the 90% percentile
- Frequency distribution
String ranging
String ranging
- Minimal, maximal and average length
- Number of records within the 90% percentile length
- Number/percentage of records that contain characters only, digits, special symbols
- Number/percentage of records that contain "http” or "https"
Date and Time ranging
Date and Time ranging
- Minimal, maximal and average values
- Number of records with [minimal, minimal + DELTA), (maximal - DELTA, maximal] and (average - DELTA, average + DELTA) values
- Number of records in the 90% percentile
- Frequency distribution
Boolean ranging
Boolean ranging
- Number/percentage of True/False/Non-boolean values
Non-duplication
Non-duplication
- Number/percentage of explicit duplicates
- Number/percentage of implicit duplicates
Language detection
Language detection
- List of used languages
Spelling
Spelling
- Number of potential issues (English only)
URL Accessibility
URL Accessibility
- Number of URLs
- Number of inaccessible URLs
Image Analysis
Image Analysis
- Number/percentage of images with file size larger than MAX_FILESIZE
- Number/percentage of images with size in pixels out of predefined values
- Number/percentage of images with resolution (dpi) lower than predefined value
- Number/percentage of images with aspect ratio out of predefined value
- Number/percentage of images with image format other than predefined formats
Document File Analysis
Document File Analysis
- Number/percentage of documents with file size larger than MAX_FILESIZE
- Number/percentage of documents with file format other than predefined formats
Check quality of your data
To try Data Quality checker, upload file in CSV format and get data quality report.
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Customizations
Standalone application
Integrated component
Consistency rules modification
New consistency rules
Data sources
Data formats
Transfer protocols
Large scale
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