Recent changes to FAQ

FAQ modified by A BibDesk User

A BibDesk User — Sun, 05 Mar 2023 20:22:08 -0000

--- v15
+++ v16
@@ -89,7 +89,7 @@

 BibDesk uses the Bdsk-File-\* and Bdsk-Url-\* fields to save location information for linked files and linked URLs, respectively. These are the linked files and URLs that appear as icons on the right-hand side pane of the main window and the detail window. Files are now stored using Mac OS aliases, so you can move them in the Finder without breaking BibDesk's links.

-If you need to translate those fields from their Base64-encoded format into a plain-text format that is readable by another application such as JabRef, you can use an export [template](Templates) such as [this one that puts the first linked file into the the Local-Url field](https://bibdesk.sourceforge.io/templates/minimalBibTeXWithLocalUrlTemplate.bib). Ed Summers wrote a Python script, [bibdesk2zotero](https://github.com/edsu/bibdesk2zotero), that will also do something like this.
+If you need to translate those fields from their Base64-encoded format into a plain-text format that is readable by another application such as JabRef, you can use an export [template](Templates) such as [this one that puts the first linked file into the the Local-Url field](https://bibdesk.sourceforge.io/templates/minimalBibTeXWithLocalUrlTemplate.bib). Ed Summers wrote a Python script, [bibdesk2zotero](https://github.com/edsu/bibdesk2zotero), that will also do something like this. [Since January 2023](https://github.com/retorquere/zotero-better-bibtex/issues/2374), the [Better BibTeX for Zotero](https://retorque.re/zotero-better-bibtex/) plugin can read Bdsk-File-\* fields and convert them to the corresponding Zotero fields when importing a BibDesk file to Zotero.

 * * *

@@ -134,7 +134,7 @@

 You can also write interactive [AppleScripts](BibDesk_Applescripts) to make batch changes to fields; put the scripts in BibDesk's Scripts folder, and then run them from the Scripts menu.

-Finally, remember that BibDesk files are plain-text files. When they are not open in BibDesk, they can be batch edited with any plain-text editor or with Unix tools such as Gerd Neugebauer's [BibTool](https://www.ctan.org/texarchive/biblio/bibtex/utils/bibtool). However, unlike using an AppleScript within BibDesk or BibDesk's Database Find and Replace, batch editing the file outside of BibDesk will not increment BibDesk's Date Modified field for the affected publications.
+Finally, remember that BibDesk files are plain-text files. When they are not open in BibDesk, they can be batch edited with any plain-text editor or with Unix tools such as Gerd Neugebauer's [BibTool](https://www.ctan.org/texarchive/biblio/bibtex/utils/bibtool). However, unlike using an AppleScript within BibDesk or BibDesk's Database Find and Replace, batch editing the file outside of BibDesk will not increment BibDesk's Date-Modified field for the affected publications.

 * * *

@@ -206,4 +206,4 @@

 The bibtex style (the .bst file, specified in the `\bibliographystyle{}` command) that you are using must be aware of the BibTeX-type "webpage" and know what to do with "Lastchecked" or "Url". This is done by [urlbst](https://ctan.org/pkg/urlbst). It seems that the [natbib](https://ctan.org/pkg/natbib) styles also support by default URL and DOI. 

-You may also be interested in biblatex: Before you invest time in traditional bibtex and how to add support for urls, consider [biblatex](http://www.ctan.org/tex-archive/help/Catalogue/entries/biblatex.html).
+You may also be interested in biblatex: Before you invest time in traditional bibtex and how to add support for URLs, consider [biblatex](http://www.ctan.org/tex-archive/help/Catalogue/entries/biblatex.html).

FAQ modified by A BibDesk User

A BibDesk User — Sat, 10 Apr 2021 02:43:08 -0000

--- v14
+++ v15
@@ -20,15 +20,15 @@

 Select the BibTeX style (in Endnote 9, the current style is in the toolbar; click on it, select "Select Another Style", and choose "BibTeX Export") 

-Then select File->Export. Save file as type Text Only, make sure "Export Selected References" is unchecked if you want to save all the references in your file, then save the file. 
+Then select File → Export. Save file as type Text Only, make sure "Export Selected References" is unchecked if you want to save all the references in your file, then save the file. 

 Rename the file with a .bib extension in the Finder. 

-Then open BibDesk and select File -> Open Using Temporary Cite Keys. After it opens, it is recommended to generate cite keys to replace the temporary ones. Then select File -> Save As (cmd-shift-S) and save the file under a new file name. 
-
-NB: Open Using Temporary Cite Keys creates a temporary file, so if you cannot just use File->Save (cmd-S) to save the file. 
-
-Alternatively you can use a custom output style. Once that output style has been made available to EndNote make it active and either export selected references to a text file that you name as a .bib file and open in BibDesk or use the clipboard (choose menu command "Edit -> Copy Formatted" and then paste into a BibDesk window). 
+Then open BibDesk and select File → Open Using Temporary Cite Keys. After it opens, it is recommended to generate cite keys to replace the temporary ones. Then select File → Save As (cmd-shift-S) and save the file under a new file name. 
+
+NB: Open Using Temporary Cite Keys creates a temporary file, so if you cannot just use File → Save (cmd-S) to save the file. 
+
+Alternatively you can use a custom output style. Once that output style has been made available to EndNote make it active and either export selected references to a text file that you name as a .bib file and open in BibDesk or use the clipboard (choose menu command "Edit → Copy Formatted" and then paste into a BibDesk window). 

 * * *

@@ -77,7 +77,7 @@

 The local file and remote URL fields, such as Local-Url and Url, have been deprecated in favor of the linked files and URLs displayed in the side panes. As a result, newly added linked files and URLs are not added to the Local-Url and Url fields anymore. If you want to display new-style linked files and URLs in the main table, you should add a Local File or Remote URL column to the table as follows: 

-  1. Choose the View -> Columns -> Add Other... menu item 
+  1. Choose the View → Columns → Add Other... menu item 
   2. In the sheet that appears, click the downward triangle to display a drop-down menu 
   3. From the drop-down menu, choose "Local File" (you can't type it in directly) 
   4. Click the "Add" button 
@@ -109,7 +109,7 @@

 To set a field in a batch of items to a fixed value, do the following: 

-  * Open the "Database Find and Replace" panel from the Edit -> Find menu 
+  * Open the "Database Find and Replace" panel from the Edit → Find menu 
   * Select or enter the name of the field you want to change 
   * Select "Overwrite or Add this field" 
   * Optionally, select "Only replace in selected items" 
@@ -118,7 +118,7 @@

 To Find & Replace text of a field in a batch of items, do the following: 

-  * Open the "Database Find and Replace" panel from the Edit -> Find menu 
+  * Open the "Database Find and Replace" panel from the Edit → Find menu 
   * Select or enter the name of the field you want to change 
   * Optionally, select "Only replace in selected items" 
   * Enter the text you want to replace for this field in the "Find string" field 
@@ -147,7 +147,7 @@
   * Be sure to have a backup of your file in case something unintended happens, though you can undo :-) 
   * Sort your items using the Date-Added (Added) column 
   * Select all items which have an unset Date-Added 
-  * Open the "Database Find and Replace" panel from the Edit -> Find menu 
+  * Open the "Database Find and Replace" panel from the Edit → Find menu 
   * Select "Overwrite or Add this field" as well as "Only replace in selected items" in the find panel 
   * Enter some old date into the "Replace with" field (in a "YYYY-MM-DD" format, like "2006-01-01" for January 1st 2006) 
   * Hit "Replace All"

FAQ modified by A BibDesk User

A BibDesk User — Fri, 09 Apr 2021 18:04:14 -0000

--- v13
+++ v14
@@ -134,7 +134,7 @@

 You can also write interactive [AppleScripts](BibDesk_Applescripts) to make batch changes to fields; put the scripts in BibDesk's Scripts folder, and then run them from the Scripts menu.

-Finally, remember that BibDesk files are plain-text files. When they are not open in BibDesk, they can be batch edited with any plain-text editor or with Unix tools such as Gerd Neugebauer's [BibTool](https://www.ctan.org/texarchive/biblio/bibtex/utils/bibtool).
+Finally, remember that BibDesk files are plain-text files. When they are not open in BibDesk, they can be batch edited with any plain-text editor or with Unix tools such as Gerd Neugebauer's [BibTool](https://www.ctan.org/texarchive/biblio/bibtex/utils/bibtool). However, unlike using an AppleScript within BibDesk or BibDesk's Database Find and Replace, batch editing the file outside of BibDesk will not increment BibDesk's Date Modified field for the affected publications.

 * * *

FAQ modified by Christiaan Hofman

Christiaan Hofman — Fri, 09 Apr 2021 14:51:30 -0000

--- v12
+++ v13
@@ -10,7 +10,7 @@

 ### BibDesk will not launch!

-After (re)installing BibDesk from a download, sometimes the system refuses to open BibDesk, instead showing the message "“BibDesk” can’t be opened because Apple cannot check it for malicious software." When this happens, go to the Security & Privacy pane in your System Preferences, and in the General tab make sure you "Allow apps downloaded from:" "App store and identified developers". Then, navigate in Finder to BibDesk.app, probably in your Applications folder, and Open BibDesk from the contextual menu in the Finder (found by control-clicking, *not* by double-clicking, on BibDesk), and Accept the opening of BibDesk. After this, you should be able to launch BibDesk normally.
+After (re)installing an older version of BibDesk or a nightly build, sometimes the system refuses to open BibDesk, instead showing the message "“BibDesk” can’t be opened because Apple cannot check it for malicious software." When this happens, go to the Security & Privacy pane in your System Preferences, and in the General tab make sure you "Allow apps downloaded from:" "App store and identified developers". Then, navigate in Finder to BibDesk.app, probably in your Applications folder, and Open BibDesk from the contextual menu in the Finder (found by control-clicking, *not* by double-clicking, on BibDesk), and Accept the opening of BibDesk. After this, you should be able to launch BibDesk normally.

 * * *

FAQ modified by A BibDesk User

A BibDesk User — Thu, 08 Apr 2021 22:04:33 -0000

--- v11
+++ v12
@@ -198,26 +198,12 @@

 (Answer from Daniel Becker on the bibdesk-users list, edited a bit by Michael McCracken) 

-You need to use the hyperref package, and the url environment to get properly encoded URLs in LaTeX. 
-
-The underscore is a special symbol for math in LaTeX, hence it wants to enclose it in dollar signs, as in 
-    
-    $x_A^2$
-
-. For bibtex, just loading the hyperref package is not enough. If you put the url in a command like 
-    
-    \url{www.test.de/bla_58}
-
-\- then hyperref kicks in and does its work. 
-
-In order to have the URL actually appear in the reference, you can either put it in the "Note" field of your item or you can to use an entry type like webpage, url, online or so. 
-
-The bibtex style (bst file, specified in the 
-    
-    \bibliographystyle{}
-
-command) you are using must be aware of the BibTeX-type "webpage" and know what to do with "Lastchecked" or "Url". This is done by http://purl.org/nxg/dist/urlbst 
-
-It seems that natbib also supports by default URL and doi. 
-
-You may also be interested in biblatex: Before you invest time in traditional bibtex and how to add support for urls, consider [biblatex](http://www.ctan.org/tex-archive/help/Catalogue/entries/biblatex.html). 
+You need to use the [hyperref](https://ctan.org/pkg/hyperref) package, and the url environment to get properly encoded URLs in LaTeX. 
+
+The underscore is a special symbol for math in LaTeX, hence it wants to enclose it in dollar signs, as in `$x_A^2$`. For bibtex, just loading the hyperref package is not enough. If you put the url in a command like `\url{www.test.de/bla_58}` then hyperref kicks in and does its work. 
+
+In order to have the URL actually appear in the reference, you can either put it in the "Note" field of your item or you can to use an entry type like webpage, url, online, etc. 
+
+The bibtex style (the .bst file, specified in the `\bibliographystyle{}` command) that you are using must be aware of the BibTeX-type "webpage" and know what to do with "Lastchecked" or "Url". This is done by [urlbst](https://ctan.org/pkg/urlbst). It seems that the [natbib](https://ctan.org/pkg/natbib) styles also support by default URL and DOI. 
+
+You may also be interested in biblatex: Before you invest time in traditional bibtex and how to add support for urls, consider [biblatex](http://www.ctan.org/tex-archive/help/Catalogue/entries/biblatex.html).

FAQ modified by A BibDesk User

A BibDesk User — Thu, 08 Apr 2021 21:52:57 -0000

--- v10
+++ v11
@@ -11,6 +11,8 @@
 ### BibDesk will not launch!

 After (re)installing BibDesk from a download, sometimes the system refuses to open BibDesk, instead showing the message "“BibDesk” can’t be opened because Apple cannot check it for malicious software." When this happens, go to the Security & Privacy pane in your System Preferences, and in the General tab make sure you "Allow apps downloaded from:" "App store and identified developers". Then, navigate in Finder to BibDesk.app, probably in your Applications folder, and Open BibDesk from the contextual menu in the Finder (found by control-clicking, *not* by double-clicking, on BibDesk), and Accept the opening of BibDesk. After this, you should be able to launch BibDesk normally.
+
+* * *

 ## Importing Data

@@ -53,6 +55,14 @@

 * * *

+## Interacting with Other Programs
+
+### How do I use BibDesk with Microsoft Word, Apple Pages, or TextEdit?
+
+There are various ways to cite from BibDesk in writing applications such as Microsoft Word, Apple Pages, or TextEdit. See [Using BibDesk Citations in Editors and Word Processors](Format_Citations_for_Editors) for more information.
+
+* * *
+
 ## General

 ### Why can't I create a new record by dragging a PDF file into the reference window?
@@ -164,12 +174,6 @@

 * * *

-## Interacting with other programs
-
-### How do I use BibDesk with Microsoft Word, Apple Pages, or TextEdit?
-
-There are various ways to cite from BibDesk in writing applications such as Microsoft Word, Apple Pages, or TextEdit. See [Using BibDesk Citations in Editors and Word Processors](Format_Citations_for_Editors) for more information.
-
 ## Templates and Macros

 ### How do I write a template that expands all macros except for the Month?

FAQ modified by A BibDesk User

A BibDesk User — Thu, 08 Apr 2021 21:46:58 -0000

--- v9
+++ v10
@@ -10,23 +10,23 @@

 ### BibDesk will not launch!

-After (re)installing BibDesk from a download, sometimes the system refuses to open BibDesk, instead showing the message "“BibDesk” can’t be opened because Apple cannot check it for malicious software." When this happens, go to your the Security & Privacy in your System Preferences, and in the General tab make sure you "Allow apps downloaded from:" "App store and identified developers." Then, navigate in Finder to BibDesk.app, probably in your Applications folder, and Open BibDesk from the contextual menu in the finder UI, and Accept the opening of BibDesk. After this, you should be able to launch BibDesk normally.
+After (re)installing BibDesk from a download, sometimes the system refuses to open BibDesk, instead showing the message "“BibDesk” can’t be opened because Apple cannot check it for malicious software." When this happens, go to the Security & Privacy pane in your System Preferences, and in the General tab make sure you "Allow apps downloaded from:" "App store and identified developers". Then, navigate in Finder to BibDesk.app, probably in your Applications folder, and Open BibDesk from the contextual menu in the Finder (found by control-clicking, *not* by double-clicking, on BibDesk), and Accept the opening of BibDesk. After this, you should be able to launch BibDesk normally.

 ## Importing Data

 ### How can I import a database from Endnote to BibDesk?

-Select the BibTeX style (in Endnote 9, the current style is in the toolbar - click on it, select "Select Another Style", and choose "BibTeX Export") 
+Select the BibTeX style (in Endnote 9, the current style is in the toolbar; click on it, select "Select Another Style", and choose "BibTeX Export") 

 Then select File->Export. Save file as type Text Only, make sure "Export Selected References" is unchecked if you want to save all the references in your file, then save the file. 

 Rename the file with a .bib extension in the Finder. 

-Then open BibDesk and select File->Open Using Temporary Cite Keys. After it opens, it is recommended to generate cite keys to replace the temporary ones. Then select File->Save As (cmd-shift-S) and save the file under a new file name. 
+Then open BibDesk and select File -> Open Using Temporary Cite Keys. After it opens, it is recommended to generate cite keys to replace the temporary ones. Then select File -> Save As (cmd-shift-S) and save the file under a new file name. 

 NB: Open Using Temporary Cite Keys creates a temporary file, so if you cannot just use File->Save (cmd-S) to save the file. 

-Alternatively you can use an output style. You find such a style [here](http://www.sysecol.ethz.ch/How_to_write.html#TeX). Once that output style has been made available to EndNote make it active and either export selected references to a text file that you name as a bib-file and open in BibDesk or use the clipboard (choose menu command "Edit -> Copy Formatted" and then paste into a BibDesk window). 
+Alternatively you can use a custom output style. Once that output style has been made available to EndNote make it active and either export selected references to a text file that you name as a .bib file and open in BibDesk or use the clipboard (choose menu command "Edit -> Copy Formatted" and then paste into a BibDesk window). 

 * * *

@@ -59,7 +59,7 @@

 Q: When I try dragging a PDF into the reference window., I do not get a new record. Instead, the PDF is added to whichever record I put it on top of. Am I missing something? 

-A: The table allows dragging onto records to update them with the file you drop as well as dragging into empty space on the table to create a new record. If there is no empty space to drag to, you need to drop it **between** two rows - you should be able to tell that the whole table is highlighted when you move the dragged PDF up and down across row boundaries. Drop it while the whole table is highlighted and you'll create a new entry. 
+A: The table allows dragging onto records to update them with the file you drop as well as dragging into empty space on the table to create a new record. If there is no empty space to drag to, you need to drop it **between** two rows or at the very top or bottom; you should be able to tell that the whole table is highlighted when you move the dragged PDF up and down across row boundaries. Drop it while the whole table is highlighted and you'll create a new entry. 

 * * *

@@ -67,7 +67,7 @@

 The local file and remote URL fields, such as Local-Url and Url, have been deprecated in favor of the linked files and URLs displayed in the side panes. As a result, newly added linked files and URLs are not added to the Local-Url and Url fields anymore. If you want to display new-style linked files and URLs in the main table, you should add a Local File or Remote URL column to the table as follows: 

-  1. Choose the View->Columns->Add Other... menu item 
+  1. Choose the View -> Columns -> Add Other... menu item 
   2. In the sheet that appears, click the downward triangle to display a drop-down menu 
   3. From the drop-down menu, choose "Local File" (you can't type it in directly) 
   4. Click the "Add" button 
@@ -75,15 +75,17 @@

 * * *

-### What are all these Bdsk-File-* and Bdsk-Url-* fields that appear in my bibtex file?
-
-BibDesk uses the Bdsk-File-* and Bdsk-Url-*fields to save location information for linked files and linked URLs, respectively. These are the linked files and URLs that appear as icons on the right-hand side pane of the main window and the detail window. Files are now stored using Mac OS aliases, so you can move them in the Finder without breaking BibDesk's links. 
+### What are all these Bdsk-File-\* and Bdsk-Url-\* fields that appear in my bibtex file?
+
+BibDesk uses the Bdsk-File-\* and Bdsk-Url-\* fields to save location information for linked files and linked URLs, respectively. These are the linked files and URLs that appear as icons on the right-hand side pane of the main window and the detail window. Files are now stored using Mac OS aliases, so you can move them in the Finder without breaking BibDesk's links.
+
+If you need to translate those fields from their Base64-encoded format into a plain-text format that is readable by another application such as JabRef, you can use an export [template](Templates) such as [this one that puts the first linked file into the the Local-Url field](https://bibdesk.sourceforge.io/templates/minimalBibTeXWithLocalUrlTemplate.bib). Ed Summers wrote a Python script, [bibdesk2zotero](https://github.com/edsu/bibdesk2zotero), that will also do something like this.

 * * *

 ### Can I create folders containing static and/or smart groups?

-No. This is planned for BibDesk 2. See http://sourceforge.net/tracker/index.php?func=detail&aid=1431354&group_id=61487&atid=497426 
+No. At one time [this was planned for BibDesk 2](http://sourceforge.net/tracker/index.php?func=detail&aid=1431354&group_id=61487&atid=497426), but the plan was abandoned. An alternative is to carefully plan a naming scheme for your static and/or smart groups so that some groups (the groups that you want to group) appear adjacent to each other in the list.

 * * *

@@ -119,6 +121,10 @@
   * Double-click the group with the text you want to change 
   * Change the text to the text you want to replace this with 
   * Note that the text match is case insensitive, and authors are matched in a fuzzy way. 
+
+You can also write interactive [AppleScripts](BibDesk_Applescripts) to make batch changes to fields; put the scripts in BibDesk's Scripts folder, and then run them from the Scripts menu.
+
+Finally, remember that BibDesk files are plain-text files. When they are not open in BibDesk, they can be batch edited with any plain-text editor or with Unix tools such as Gerd Neugebauer's [BibTool](https://www.ctan.org/texarchive/biblio/bibtex/utils/bibtool).

 * * *

@@ -162,7 +168,7 @@

 ### How do I use BibDesk with Microsoft Word, Apple Pages, or TextEdit?

-This is done with plugin scripts and applications that have been contributed by users. See [Format_Citations_for_Editors] for more information. 
+There are various ways to cite from BibDesk in writing applications such as Microsoft Word, Apple Pages, or TextEdit. See [Using BibDesk Citations in Editors and Word Processors](Format_Citations_for_Editors) for more information.

 ## Templates and Macros

@@ -170,10 +176,15 @@

 This comes up if you want to share data with someone who may not have the same macro expansion for the month (maybe they'll use a different style file, for instance). 

-Here is an example from Christiaan on the mailing list: 
-    
-    
-    
+[Christiaan provided an example on the mailing list](https://sourceforge.net/p/bibdesk/mailman/message/21317703/): He noted that in [Templates](Templates) there is a template to export unexpanded bibtex strings. If you want to expand all fields except for the Month, you can use the following template:
+
+~~~
+<$publications>
+@<$pubType/>{<$citeKey/><$allFields.@...>,
+   <$name/> = <$name=Month?><$bibTeXString/>{<$value/>}
+}
+
+~~~

 * * *

FAQ modified by Christiaan Hofman

Christiaan Hofman — Thu, 04 Mar 2021 17:08:01 -0000

--- v8
+++ v9
@@ -5,6 +5,12 @@
 Feel free to add answers here to commonly asked questions on the BibDesk users' list!

 * * *
+
+## Installing BibDesk
+
+### BibDesk will not launch!
+
+After (re)installing BibDesk from a download, sometimes the system refuses to open BibDesk, instead showing the message "“BibDesk” can’t be opened because Apple cannot check it for malicious software." When this happens, go to your the Security & Privacy in your System Preferences, and in the General tab make sure you "Allow apps downloaded from:" "App store and identified developers." Then, navigate in Finder to BibDesk.app, probably in your Applications folder, and Open BibDesk from the contextual menu in the finder UI, and Accept the opening of BibDesk. After this, you should be able to launch BibDesk normally.

 ## Importing Data

FAQ modified by Fischlin Andreas

Fischlin Andreas — Sat, 21 Jun 2014 21:17:17 -0000

--- v7
+++ v8
@@ -19,6 +19,8 @@
 Then open BibDesk and select File->Open Using Temporary Cite Keys. After it opens, it is recommended to generate cite keys to replace the temporary ones. Then select File->Save As (cmd-shift-S) and save the file under a new file name.

 NB: Open Using Temporary Cite Keys creates a temporary file, so if you cannot just use File->Save (cmd-S) to save the file. 
+
+Alternatively you can use an output style. You find such a style [here](http://www.sysecol.ethz.ch/How_to_write.html#TeX). Once that output style has been made available to EndNote make it active and either export selected references to a text file that you name as a bib-file and open in BibDesk or use the clipboard (choose menu command "Edit -> Copy Formatted" and then paste into a BibDesk window). 

 * * *

FAQ modified by Michael McCracken

Michael McCracken — Sat, 21 Jun 2014 21:17:17 -0000

--- v6
+++ v7
@@ -177,13 +177,23 @@

 You need to use the hyperref package, and the url environment to get properly encoded URLs in LaTeX. 

-The underscore is a special symbol for math in LaTeX, hence it wants to enclose it in dollar signs, as in <source lang="latex">$x_A^2$</source>. For bibtex, just loading the hyperref package is not enough. 
-
-If you put the url in a command like <source lang="latex">\url{www.test.de/bla_58}</source> \- then hyperref kicks in and does its work. 
+The underscore is a special symbol for math in LaTeX, hence it wants to enclose it in dollar signs, as in 
+    
+    $x_A^2$
+
+. For bibtex, just loading the hyperref package is not enough. If you put the url in a command like 
+    
+    \url{www.test.de/bla_58}
+
+\- then hyperref kicks in and does its work. 

 In order to have the URL actually appear in the reference, you can either put it in the "Note" field of your item or you can to use an entry type like webpage, url, online or so. 

-The bibtex style (bst file, specified in the <source lang="latex">\bibliographystyle{}</source> command) you are using must be aware of the BibTeX-type "webpage" and know what to do with "Lastchecked" or "Url". This is done by http://purl.org/nxg/dist/urlbst 
+The bibtex style (bst file, specified in the 
+    
+    \bibliographystyle{}
+
+command) you are using must be aware of the BibTeX-type "webpage" and know what to do with "Lastchecked" or "Url". This is done by http://purl.org/nxg/dist/urlbst 

 It seems that natbib also supports by default URL and doi.