System Fields

 System Fields have special properties, and  have IDs less than 200.
They are shown in with a grey background in the properties pane and in Field Management.
These fields are protected fields. Most (all?) can be renamed.
 
ID Name Type Comments Reference
1 Item Text text of the item  
2 IDItem Number unique numeric ID  
3 ItemCreated Date automatic, can edit in the Properties pane  
4 ItemOwner Text user that created the item  
5 ItemModified Date automatic, can edit in the Properties pane  
6 ItemFont Text item font properties, except for colors  
7 ItemLocked Binary Locked items can be modified but not erased. Not visible in field management dialog  
8        
9 ItemHomeID Number Item Home  
10 ItemHTML Text Doc pane content  
11 FileRef Yes/No item is a file reference  
12 FileName Text  If you drag-drop files, FileName and FilePath are filled  
13 FilePath Text  If you drag-drop files, FileName and FilePath are filled  
14 SearchResults Yes/No Default field used to show the search results  
15 URL Text can hold URL of a file or website. Hyperlink  
16 WIKITag Text Depreciated. used as tags Info  
17 FileFullName Text smart field. Combines FilePath and FileName  
18 FileText Text Text content of an indexed file  
19 FileTextSize Number    
20 ItemHTMLFile Text File shown in the Doc pane  
21 ItemHTMLText Text Plain text content of the Doc pane  
22 ItemColor Text Background item color  
23 ItemsTagged Number Items that have at least one tag (currently does not work)  
24 ItemsMarked N See Marked Items. Not visible in field management dialog. How does user filter for 'tagged' items?
25 ItemForeColor Text Item Text color  
26 ItemHasHTML Yes/No Smart field that show a checkbox if the item has some content in the Doc pane  
27 ItemHTMLHeight Number During HTML export, the MHT document height cannot be determined;  ItemHTMLHeight allows you to specify the height to allocate for the MHT document.  
28 ItemTextSize Number number of characters in all text fields combined.  
29 ItemHTMLTextSize Number number of characters in the Doc pane.  
30 ItemHTMLSize Number Doc pane storage size  
31 TextFields Text Item's text fields. Useful to search. Not visible in field management dialog.  
32 DateFields Date Item's date fields. Useful to search. Not visible in field management dialog.  
33 NumberFields Number Item's number fields. Useful to search. Not visible in field management dialog.  
34 BinaryFields Binary Item's Y/N fields. Useful to search. Not visible in field management dialog.  
35        
36        
37        
38        
39 ItemHTMLWordCount Number Word count  
40 NbChildren Number Calculated field  
41 nbParents Number Calculated field  
42 ItemParent Text Text of the item parent (smart field)  
43 ItemGParent Text Text of the item grand-parent (smart field)  
44        
45 System Yes/No Container field. Used to be able to show/hide child fields  
46 Tags Yes/No Indicates the item is a Tag. Info  
47 TagID Number Unique tag ID  
48        
49 Notes Text General purpose notes field. Available in the Item Editor  
50 Appointments Date Default date field to create events  
51 ItemDuration Number Length (in hours) for an event  
52 ItemInCalendar  Yes/No Item is shown in the Calendar (smart field)  
53        
54        
55 ItemHTMLStyle Text Style sheet to use for the doc pane content  
56 ItemHTMLCaretPos Number Depreciated. Cursor position in the HTML pane  
57        
58        
59        
60 AddressBook Yes/No    
61        
62        
63        
64        
65        
66        
67        
68        
69        
70 Inbox Yes/No    
71 Today Yes/No Following 4 fields are used in GTD type task management  
72 Tomorrow Yes/No    
73 ThisWeek Yes/No    
74 NextWeek Yes/No    
75 Reference Yes/No    
76 Favorites Yes/No Item is a Favorite Info 
77 ItemHomeGrid  Text Depreciated  
78 OutlineStyles Yes/No Item is an Outline Style Info
79        
80 DueDate Date Date the task is due Info
81 Done Date Default "Mark as Done" field. Ctrl+M to mark/unmark item as done  
82 TaskList Text Task list a task belongs to Info
83 ToDo Date Date the task was created  
84 TaskOrder Number    
85  Emails  Yes/No Item is an email. Fields 85-88 are automatically filled when importing emails  
86  EmailSender  Text    
87  EmailRecipients  Text    
88  EmailDate  Date    
89        
90 TaskActStart Date For Gantt charts, the start date of the task. Info
91 TaskActEnd Date For Gantt charts, the end date of the task  
92        
93 NextTaskDelay Number For Gantt charts, the delay between a task ending and the start of the next task Info
94 TaskDuration Number For Gantt charts, task Duration in days. Default caption is "Nb Days"  
95 Task%Complete Number For Gantt charts Percentage of task that is complete Info
96 TaskEffort Number In a future release you'll be able to enter the Effort and duration for each of your task and the Gantt will show you when you're in the red... (i.e. when you'll need to do overtime)  
97 TaskID Number Gantt charts, when linking tasks, the fields TaskID and NextTaskID are assigned Info
98 NextTaskID Text    
99 TaskActBarColor Text Gantt charts: Item bar color  
100 TaskIsSummary Yes/No Gantt charts: item is a summary item. Start and End dates or the bar are set by the earliest/latest sub-items dates  
101 TaskBarCaption Text Gantt charts, caption to show next to the bar, if empty, will use the item text  
120 Surface1 Yes/No Item is on the IQSurface Info
130 ItemTagCount Number Nb of tags assigned. When shown in a column, press F2 to add/remove tags without opening the Tags pane. Can be used to trigger actions when tags are added / removed Info
132 ItemsRelatedCount Number Nb of related items Info
133 ItemsRelated Text List of related items (smart field) Info
145 EnSync Yes/No Sync this item with Evernote Info
146 ENTrash yes/No Item in the Evernote Trash