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Can anyone explain to me how to draw using LaTeX? (Since new users are not allowed to post an image, I'll try to explain in words what I want.) I want to draw the following relationships but I don't know how. I'm sorry, I know this question of mine is confusing, but help me if you can figure out what I mean. Thanks.:)

  ONE-TO-ONE RELATIONSHIP
  One-to-many relationship
  many-many relationship
  MANDATORY ONE ( ONE AND ONLY ONE ) RELATIONSHIP
  MANDATORY RELATIONSHIP
  OPTIONAL ONE RELATIONSHIP
  OPTIONAL MANY RELATIONSHIP
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You should be still able to upload the image using the 'add image' icon and just include a link to it. Try to remove the ! in front of the image code. – Martin Scharrer♦ May 20 '11 at 8:52
Dia can help with ER and UML diagrams. – Andrey Vihrov May 20 '11 at 9:52
Are you referring to the type of diagram that is shown on the right of Wikipedia's page on injective functions? – Ian Thompson May 20 '11 at 11:56
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Have a look at TikZ/PGF it has a ver good manual with many examples and tutorials. – Tobi May 20 '11 at 15:39
A rather open-ended question. External editors: xfig, Dia, inkscape... Diagramming in (La)TeX: TikZ/PGF or pstricks (especially pst-node if the linked Wikipedia reference is what you are aiming for). – Dean Serenevy May 20 '11 at 20:20

closed as not a real question by Alan Munn, Joseph Wright♦ Aug 8 '11 at 21:08

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.

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