"the purpose is to inform" is correct and can be used in written English.
It is typically used to introduce the reason for stating information or sharing knowledge. Example: The purpose of this article is to inform readers about the importance of recycling and how it can benefit the environment.
Here, the purpose is to inform".
The purpose is to inform engineering strategies for future contaminant flushing.
The purpose is to inform debate regarding UKCAT and medical admissions in general as well as the design of studies on the impact and validity of this new test.
When introducing guest speakers, the purpose is to inform the audience of the topic, the topic's relevance to that audience and the speaker's relevance to that topic.
The purpose was to inform each soldier gathered there that "he is now in the service of a State, possessed of sufficient power to reward his merit, and advance him to the highest Honors of a free Country".
The purpose was to inform people it wasn't OK". Now Morales wants to help others by giving a portion of the donations to the Wounded Warrior Project to help injured servicemen and women, according to NJ.com.
The purpose was to inform them of the government's plans, get feedback and -- perhaps not a secondary consideration -- create a buzz within the Iranian American diaspora and its satellite media outlets, which are beamed into Tehran.
The purpose was to inform the stakeholders about the evaluation process and to seek critical feedback about the proposed evaluation methodology.
The purposes were to inform health policy-makers in Ethiopia and to inform future global estimates undertaken by the Global Burden of Disease project (GBD) [20].
If the main purpose is to inform individual women of their risk of being overdiagnosed, the denominator that includes women of the screening age and older may be more useful.
The stated purpose is to inform providers of when a patient has a communication disability and provide guidance on how best to communicate with the patient.
