sentinel

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sentinel

Computing a character used to indicate the beginning or end of a particular block of information

sentinel

[′sent·ən·əl]
(computer science)
Symbol marking the beginning or end of an element of computer information such as an item or a tape.
References in classic literature ?
A sentinel at each end of the bridge stood with his rifle in the position known as "support," that is to say, vertical in front of the left shoulder, the hammer resting on the forearm thrown straight across the chest -- a formal and unnatural position, enforcing an erect carriage of the body.
But instead of that, at the next village the sentinels of Davout's infantry corps detained him as the pickets of the vanguard had done, and an adjutant of the corps commander, who was fetched, conducted him into the village to Marshal Davout.
A single sentinel in the rear of the building barred the way.
The Custom House stood at a little distance down King Street, nearly where the Suffolk Bank now stands, and a sentinel was continually pacing before its front.
It is this, sir," said the king, angrily, "that General Cromwell has reached Newcastle; that you knew it and I was not informed of it; that the enemy have left the town and are now closing the passages of the Tyne against us; that our sentinels have seen this movement and I have been left unacquainted with it; that, by an infamous treaty you have sold me for two hundred thousand pounds to Parliament.
Men and women looked down upon him from shadowy balconies, but spoke not; and sentinels saw him pass and did not challenge.
In its front might be seen the scattered sentinels, who held a weary watch against their numerous foes; and within the walls themselves, the travelers looked down upon men still drowsy with a night of vigilance.
Leaving the new arrivals in the centre of the Saloon, the Sentinel advanced to a door, at the further end of it, which bore an inscription, painted on it in Doggee, "Royal Kennel--scratch and Yell.
He turned to the sentinel and added in German, "Draw the curtain again; and if the woman persists, put her back into this room with your own hand.
On preparing the morning's meal, however, a number of cups, knives, and other articles were missing, which had, doubtless, been carried off by the fictitious elk, during the slumber of the very sagacious sentinel.
Fouquet gained ground, regardless of the cries of the man, who, however, having at last come up with Fouquet, called out to the sentinel of the second gate, "Look out, look out, sentinel
Picking up the musket, he is about to execute summary justice, as emperors are in the habit of doing, when something in the face of the weary sentinel appears to touch him.