--- a/src/example_main.rs	Mon Sep 21 17:27:15 2020 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,36 +0,0 @@
-mod driver;
-mod err;
-mod extract;
-mod http;
-mod implem;
-mod util;
-
-use implem::audiophil as audiophil;
-
-use log::{info, warn};
-use env_logger;
-use tokio;
-
-#[tokio::main]
-async fn main() {
-    env_logger::Builder::from_default_env().filter(None, log::LevelFilter::Info).init();
-
-    info!("scrapeprice: init");
-    //test_fetch_page().await.unwrap();
-
-    let logic = driver::DriverLogic {
-        explore: Box::new(audiophil::AudiophilExplorer::new()),
-        store: Box::new(util::DebuggingStorage {}),
-        extract: Box::new(audiophil::AudiophilItemPriceExtractor {}),
-    };
-    let mut driver = driver::Driver::new(logic, None);
-
-    let mut ival = tokio::time::interval(tokio::time::Duration::from_millis(2000));
-
-    loop {
-        ival.tick().await;
-        if let Err(e) = driver.drive().await {
-            warn!("Error from driver:  {}", e);
-        }
-    }
-}

--- a/src/extract.rs	Mon Sep 21 17:27:15 2020 +0200
+++ b/src/extract.rs	Tue Sep 22 13:29:39 2020 +0200
@@ -9,7 +9,7 @@
 use scraper::Html;
 
 /// A fetched document is given to the Extractor which gets information from it and returns the
-/// storable data.
+/// storable data. The underlying logic is implemented by the `scraper` crate.
 pub struct Document {
     html: Html,
 }
@@ -26,6 +26,7 @@
             html: Html::parse_document(content),
         }
     }
+    /// For every CSS selector in `selectors`, return a vec of contents in that selector.
     pub fn get_contents(&self, selectors: &[&str]) -> Result<Vec<Vec<String>>, HTTPError> {
         let mut r = Vec::with_capacity(selectors.len());
         for sel in selectors {
@@ -40,10 +41,12 @@
         }
         Ok(r)
     }
+    /// For a selector, return a vec of contents for the selector.
     pub fn get_content(&self, selector: &str) -> Result<Vec<String>, HTTPError> {
         let v = self.get_contents(&[selector])?;
         Ok(v[0].clone())
     }
+    /// For the elements described by selector, return the attributes
     pub fn get_attr(&self, selector: &str, attr: &str) -> Result<Vec<String>, HTTPError> {
         let selector = parse_selector(selector)?;
         let sel = self.html.select(&selector);