This is a multi-language repo containing scripts or tools for identifying Data Sources by their URL and HTML content.

Index

name	description of purpose
.github/workflows	Scheduling and automation
agency_identifier	Matches URLs with an agency from the PDAP database
common_crawler	Interfaces with the Common Crawl dataset to extract urls, creating batches to identify or annotate
html_tag_collector	Collects HTML header, meta, and title tags and appends them to a JSON file. The idea is to make a richer dataset for algorithm training and data labeling.
hugging_face	Utilities for interacting with our machine learning space at Hugging Face
identification_pipeline.py	The core python script uniting this modular pipeline. More details below.
openai-playground	Scripts for accessing the openai API on PDAP's shared account

Identification pipeline

In an effort to build out a fully automated system for identifying and cataloguing new data sources, this pipeline:

1. collects batches of URLs which may contain useful data
2. uses our machine learning models to label them
3. helps us and human-label them for training the models

For more detail, see the diagrams below.

How to use

1. Create an .env file in this directory with these contents, or set the environment variable another way: VUE_APP_PDAP_API_KEY=KeyGoesHere
2. Create a file in this directory containing a list of urls to be identified, or modify the existing urls.csv file. This requires one URL per line with at least a url column.
3. Run python3 identification_pipeline.py urls.csv
4. Results will be written in the same directory as results.csv
5. If importing "identification_pipeline_main" function, it expects a dataframe as an argument and returns a resulting dataframe

Contributing

Thank you for your interest in contributing to this project! Please follow these guidelines:

• If you want to work on something, create an issue first so the broader community can discuss it.
• If you make a utility, script, app, or other useful bit of code: put it in a top-level directory with an appropriate name and dedicated README and add it to the index.

Diagrams

Training models by batching and annotating URLs

%% Here's a guide to mermaid syntax: https://mermaid.js.org/syntax/flowchart.html

sequenceDiagram

participant HF as Hugging Face
participant GH as GitHub
participant LS as Label Studio
participant PDAP as PDAP API

loop create batches of URLs <br/>for human labeling
  GH ->> GH: Crawl for a new batch<br/> of URLs with common_crawler<br/> or other methods
  GH ->> GH: Add metadata to each batch<br/> with source_tag_collector
  GH ->> HF: Add the batch <br/> of URLs to a dataset
  HF -->> GH: Confirm batch created
  GH ->> LS: Create labeling tasks <br/> from the batch
  LS -->> GH: Confirm tasks created
  GH ->> GH: add batches to a log file <br/> in this repo with URL<br/> and batch IDs
end

loop annotate URLs
  LS ->> LS: Users annotate using<br/>Label Studio interface
end

loop update training data <br/> with new annotations
  GH ->> LS: Check for completed <br/> annotation tasks
  LS -->> GH: Confirm new annotations <br/> since last check
  GH ->> HF: Write new annotations to <br/> training dataset
  GH ->> GH: log batch status to file
end

loop check PDAP database <br/>for new sources
  GH ->> PDAP: Trigger action to check <br/> for new data sources
  PDAP -->> GH: confirm sources available <br/> since last check
  GH ->> GH: Collect additional metadata
  GH ->> HF: Write sources to <br/> training dataset
end

loop model training
  GH ->> HF: retrain ML models with <br/>updated data using <br/>trainer in hugging_face
end

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Using trained models to identify URLs

Each of these steps may be attempted with regex, human identification, or machine learning. We combine several machine learning (ML) models, each focusing on a specific task or property.

%% Here's a guide to mermaid syntax: https://mermaid.js.org/syntax/flowchart.html

sequenceDiagram

participant HF as Hugging Face
participant GH as GitHub
participant PDAP as PDAP API

GH ->> GH: Start with a batch of URLs from <br/> common_crawler or another source <br/> with a batch log file
GH ->> PDAP: Check for duplicate URLs
PDAP ->> GH: Report back duplicates to remove
GH ->> HF: Create batch for identification
HF -->> GH: Confirm batch created

loop trigger Hugging Face models to add <br/>labels to the same dataset
  GH ->> HF: Check URLs for relevance <br/> to police, courts, or jails
  HF -->> GH: complete
  GH ->> HF: Check relevant URLs for <br/> "individual records"
  HF -->> GH: complete
  note over HF,GH: Ignore irrelevant and <br/> individual record sources <br/> for following steps
  GH ->> HF: Identify an agency or <br/> geographic area
  GH ->> HF: Identify record_type, <br/> name, and description
  HF -->> GH: Confirm batch complete
end

GH ->> PDAP: Submit URLs for manual approval

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Docstring and Type Checking

Docstrings and Type Checking are checked using the pydocstyle and mypy modules, respectively. When making a pull request, a Github Action (python_checks.yml) will run and, if it detects any missing docstrings or type hints in files that you have modified, post them in the Pull Request.

These will not block any Pull request, but exist primarily as advisory comments to encourage good coding standards.

Note that python_checks.yml will only function on pull requests made from within the repo, not from a forked repo.