The Republican National Convention will spend much of Tuesday discussing its detailed, 30,000-word platform - five times as long as a more general Democratic platform.

Following are key areas where Republicans and Democrats differ:TAXES: The Democratic platform did not mention the word "tax." The Republican platform says, "We oppose any attempts to increase taxes."

BALANCED BUDGET AMENDMENT TO THE CONSTITUTION: The Democratic platform takes no stand, but Michael Dukakis opposes it. The Republican platform supports the proposed amendment.

ABORTION: The Democratic platform says only, "The fundamental right of reproductive choice should be guaranteed regardless of ability to pay." The Republican platform says, "The unborn child has a fundamental individual right to life which cannot be infringed. We support a human life amendment to the Constitution, and we endorse legislation to make clear that the Fourteenth Amendment's protections apply to children."

THE EQUAL RIGHTS AMENDMENT: The Democratic platform supports its passage; Republicans oppose it.

GUN CONTROL: The Democratic platform takes no stand, but Dukakis favors it. The Republican platform says, "Republicans defend the constitutional right to keep and bear arms. When this right is abused by an individual who uses a gun in the commission of a crime, we call for stiff, mandatory penalties.

GAY RIGHTS: The Democratic platform favors equal rights regardless of "sexual orientation." The Republican platform does not address gay rights.

DEATH PENALTY: The Democratic platform does not address it, but Dukakis opposes it. The Republican platform says, "We will reestablish the federal death penalty."

"STAR WARS" DEFENSE SYSTEM: The Democratic platform urges a ban on all "space weapons." The Republican platform says, "We are committed to rapid and certain deployment of the Strategic Defense Initiative as technologies permit."