Differences

This shows you the differences between two versions of the page.

--- retrieve_pdf_metadata [2017/11/19 10:31] – bwiernik
+++ retrieve_pdf_metadata [2020/05/22 16:32] – dstillman
@@ Line 1: / Line 1: @@
 ====== Retrieve PDF Metadata ======
+Users new to Zotero may find the prospect of importing all their data somewhat daunting. Many researchers already have a large collection of PDFs that they've previously organized manually. Zotero makes it easy to import these PDFs and retrieve full bibliographic metadata (for searching, citing, indexing, and organizing), taking much of the pain out of switching.
-[[/support/screencast_tutorials/retrieve_pdf_metadata|{{ http://www.zotero.org/static/images/wiki/pdf_metadata.png?nocache}}]]
+To use this feature, simply drag your existing PDFs into your Zotero library or use the "Store Copy of File" or "Link to File" options from the add new item menu (green plus sign). By default, Zotero will automatically retrieve metadata for each PDF, create an appropriate parent item, and rename the associated file based on the metadata. (You can disable these automatic functions in the [[preferences/general|General pane]] of Zotero preferences.)
-Users new to Zotero may find the prospect of importing all their data somewhat daunting. Zotero can import bibliographic data in a wide variety of formats, but what of PDFs? Many researchers find themselves managing a massive collection of PDFs, possibly with another program designed only for that purpose or through their own methods. Zotero makes it a breeze to import these PDFs, which takes much of the pain out of switching.
+{{https://www.zotero.org/static/images/blog/5.0.36/auto-recognize@2x.gif?744}}
-Begin by dragging your existing PDFs into your Zotero library or use the "Store Copy of File" option from the add new item menu (green plus sign). Once they appear in the middle column, select the ones for which you wish to retrieve metadata. Right-click on them and select "Retrieve Metadata for PDF". If Zotero can find a match for the item, it will create a full Zotero item with the available and attach the PDF. With this feature, there should be no major hurdles to switching to Zotero and taking full advantage of all its powerful search, indexing, organizational, and citation features. If Zotero can't find metadata for an item, you can right-click on it and choose "Create Parent Item" to manually enter the item metadata.
+If Zotero can find a match for the PDF, it will create a full Zotero item with the available data and attach the PDF. If it can't, it will leave the PDF as a standalone attachment, allowing you to add a parent item [[adding_items_to_zotero|from the web or by identifier]] and drag the PDF onto it. If all else fails, you can right-click on the PDF, choose Create Parent Item, and manually enter metadata for the item.
-The Retrieve Metadata feature uses several method to locate item metadata. First, it will look for a Digital Object Identifier (DOI) or ISBN number and look these up in their respective registries. If no DOI or ISBN is found, Zotero will query the Google Scholar database for matches to the item text. If Retrieve Metadata is used on dozens of PDFs at a time (particularly for older articles without DOIs), users may be [[kb:site_access_limits|locked out by Google Scholar]]. If this occurs, Google Scholar will generally restore your access within a few hours. If Google Scholar requests CAPTCHA verification, Zotero will prompt the user.
+Zotero should retrieve high-quality metadata for most academic PDFs. While it can sometimes extract basic information (title, author) from other documents, you shouldn't expect that — anything can be distributed as a PDF, but that doesn’t mean there’s any standard metadata available for it.
-//While this feature can greatly facilitate importing large existing libraries of PDFs, it **is not** the best way to add items to your library in general. The retrieved metadata, especially from Google Scholar, will be lower quality than if you import using the Zotero Connector plugin in your browser from publisher websites or most scholarly databases. See [[getting_stuff_into_your_library|Getting Stuff into your Library]] for the best ways to add items to your library.//
+**Note:** While this feature can greatly facilitate importing large existing libraries of PDFs, it **is not** the best way to add items to your library in general. Items can be imported faster by using the Zotero Connector plugin in your browser from publisher websites or most scholarly databases. This saves several steps versus downloading the PDF manually and adding it to Zotero. The item metadata will also often be higher quality. See [[Adding Items to Zotero]] for more info.
+==== How It Works ====
+The Retrieve Metadata feature uses a Zotero web service to find item metadata. The Zotero client sends the first few pages of text from the PDF to the web service, which uses a variety of extraction algorithms and known metadata from Crossref, paired with DOI and ISBN lookups, to build a parent item for the PDF. The Zotero lookup service doesn’t require a Zotero account and doesn’t log any data about the content or results of searches.