- Course overview
- Search within this course
- Overview of key IMPC concepts and tools
- Solr query syntax: simplified explanation
- How to use the solr_request function from the impc-api python package
- How to perform a query: q parameter
- Exercise 1: getting familiar with the core
- How to request a limited number of documents: rows parameter
- Exercise 2: requesting three documents
- How to get specific fields: fl parameter
- Exercise 3: selecting specific fields
- Quiz 4: basic Solr parameters
- Filtering data in Solr: narrowing down your results
- How to query a specific field: filter by value
- Exercise 4: filtering by a single field
- How to filter numbers: range search
- Exercise 5: changing the p-value threshold
- How to combine multiple filters: Boolean operators
- Exercise 6: applying multiple filters
- How to exclude data: NOT operator
- Why parentheses are important: combine multiple Boolean operators
- Quiz 5: Boolean operators
- How to handle with null values: exclude empty fields
- Exercise 7: explore null values
- Downloading data: getting large results efficiently
- How to download large dataset effectively: pagination
- How to download the data: batch_solr_request function
- What formats are available for downloading: wt parameter
- Exercise 8: download the data
- What is the difference: JSON vs CSV
- What you need to keep in mind: query responsibly
- Quiz 6: request only necessary data
- Advanced Solr query techniques: faceting and iterating over entities
- Understanding IMPC data: resources and assistance
- Your feedback
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What is the difference between an IMPC parameter and a Solr parameter?
- In Apache Solr, a parameter is a setting or option that modifies the behaviour of a query, allowing you to customise search results. These parameters can be included in Solr queries, either in the URL (for HTTP requests) or programmatically. Common Solr parameters include
q,fl, androws. - An IMPC parameter is a measurement obtained during an experiment. For example, during an electrocardiogram procedure, the experimenter measures several values, for example heart rate (HR) and QRS interval (QRS). Each of these is a single parameter. Every parameter has a unique
parameter_stable_id; for example, QRS hasIMPC_ECG_007_001.