Salesforce: Accessing Field label of object in VisualForce page

In VFPage one can directly access the label of any particular field of sObject. In future if the label is changed in the sObject, same will be reflected in the VFPage.

For Example:

<apex:column title=”{!$ObjectType.OpportunityLineItem.fields.Quantity.label}” headerValue=”{!$ObjectType.OpportunityLineItem.fields.Quantity.label}” width=”50px”>

It also avoids hard-coded labels and make it more flexible.

Salesforce: Free Edition

What is included in Free Edition?

Users                                                               100

Custom App Per User                          1

Custom Objects Per User                                 Up to 10

Storage                                                            1 GB

Logins                                                  Unlimited

Sites page views                                               250,000 per month

Developer Sandbox                                          Included

Offline                                                  Included

Web sites                                                         1 site

Web sites pages views per month                      250,000

Web site bandwidth limit per 24 hours   10 GB

Page generation time per 24 hours                     6 hours

What is not included in Free Edition?
Sales force CRM functionality is not included in Free Edition. The following Sales force CRM standard objects are not included: Accounts, Contacts, Campaigns, Leads, Opportunities, Forecasts, Products, Cases and Solutions.

What applications can I run on Free Edition?
You can build and run one custom application or run any one 3rd party packaged application that is compatible with the functionality of Free

Can I add more users or more apps to my Free Edition account?
Yes, a Free Edition account can be converted to a Enterprise Edition or Unlimited Edition account. Free Edition does not support custom domain names Free Developer Edition

App Development/Deployment Development                                   Yes                               Yes Deployment                                    Yes                               No

Upgradeable?                                                   Yes                               No

Products and Features Included                        —                                —

Sales Cloud™                                      No                               Yes

Service Cloud™                                               No                               Yes

Mobile Platform                                                No                               Yes

Customer Portal                                               No                               Yes

Partner Portal                                                   No                               Yes

Developer Preview Features                             No                               Yes

Capacity limits

Users                                                               100                              2

Storage                                                            1 GB                            2 MB

Developer Sandbox                                          1                                  n/a


I was constantly getting exception when I tried to use the “/soap/ajax/15.0/connection.js” in the VF Page.
JavaScript throws following exception:-

Invalid SessionID

{faultcode:'sf:INVALID_SESSION_ID', faultstring:'INVALID_SESSION_ID: Invalid Session ID found in SessionHeader: Illegal Session', detail:{UnexpectedErrorFault:{exceptionCode:'INVALID_SESSION_ID', exceptionMessage:'Invalid Session ID found in SessionHeader: Illegal Session', }, }, }

The exception was resolved when I added following statement before using the “sforce.connection” object in the JavaScript.

sforce.connection.sessionId = “{!$Api.Session_ID}