Example 1 A couple of atricles taken from http://www.webster.com to illustrate the logical format of XDXF (http://xdxf.sourceforge.net/). sly 'slI slier or slyer 'slIər sliest or slyest 'slIəst Middle English sli, from Old Norse sl[oe]gr; akin to Old English slEan to strike -- more at SLAY wise in practical affairs displaying cleverness INGENIOUS clever in concealing one's aims or ends FURTIVE the sly fox lacking in straightforwardness and candor DISSEMBLING a sly scheme lightly mischievous ROGUISH a sly jest a sly smile on the sly in a manner intended to avoid notice SLY, CUNNING, CRAFTY, WILY, TRICKY, FOXY, ARTFUL, SLICK mean attaining or seeking to attain one's ends by guileful or devious means. SLY implies furtiveness, lack of candor, and skill in concealing one's aims and methods a sly corporate raider. CUNNING suggests the inventive use of sometimes limited intelligence in overreaching or circumventing the cunning fox avoided the trap. CRAFTY implies cleverness and subtlety of method a crafty lefthander. WILY implies skill and deception in maneuvering the wily fugitive escaped the posse. TRICKY is more likely to suggest shiftiness and unreliability than skill in deception and maneuvering a tricky political operative. FOXY implies a shrewd and wary craftiness usually involving devious dealing a foxy publicity man planting stories. ARTFUL implies indirectness in dealing and often connotes sophistication or cleverness elicited the information by artful questioning. SLICK emphasizes smoothness and guile slick operators selling time-sharing. slyly slyness that [th]æt[th]ət Middle English, from Old English thæt, neut. relative pronoun, from thæt, neuter demonstrative pronoun used as a function word to introduce a restrictive relative clause and to serve as a substitute within that clause for the substantive modified by the clause the house that Jack built I'll make a ghost of him that lets meShakespeare at which in which on which by which with which to which each year that the lectures are given according to what to the extent of what used after a negative has never been here that I know of that which the person who That, which, who: In current usage that refers to persons or things, which chiefly to things and rarely to subhuman entities, who chiefly to persons and sometimes to animals. The notion that that should not be used to refer to persons is without foundation; such use is entirely standard. Because that has no genitive form or construction, of which or whose must be substituted for it in contexts that call for the genitive. That, which: Although some handbooks say otherwise, that and which are both regularly used to introduce restrictive clauses in edited prose. Which is also used to introduce nonrestrictive clauses. That was formerly used to introduce nonrestrictive clauses; such use is virtually nonexistent in present-day edited prose, though it may occasionally be found in poetry.