This property specifies that the temporal extent of the domain instance A of E2 Temporal Entity ends before or simultaneously with the start of the temporal extent of the range instance B of E2 Temporal Entity.
In other words, if A = [Astart, Aend] and B = [Bstart, Bend], we mean Aend ≤ Bstart is true.
This property is part of the set of temporal primitives P173 – P176, P182 – P185.
This property corresponds to a disjunction (logical OR) of the following Allen temporal relations (Allen, 1983): {before, meets}.
![](data:image/png;base64,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)
Figure 16: Temporal entity A ends before or with the start of temporal entity B. Here A is longer than B
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA2oAAABtCAIAAABfpAV5AAALC0lEQVR42u3d22+UZR4H8F56Y+IfoJE7r7xHRFcTN3rnxgvv1mhisjeiWZMVXCqYbFaTvUEiRnezlF2jEFZ2VypZIJQG6lYQC5WCpfREa+n5OG3n0Om03YdOrZXWaWHfdqbTzydPmmnzZvrM+5vn/X1n3jmUzAAAwIqV2AUAAIiPAACIjwAAiI8AAIiPAACIjwAAiI92wRp54omZkpJbI1wAgLzbvXuuMYURLoP4KD4CgPiI+Cg+AoD4iPgoPgKA+Ij4iPgIgPiI+Ij4CID4iPiI+AiA+Ajio/gIAOIj4qP4CADiI+Kj+AgA4iPiI+IjAOIj4iPiIwDiI+Ij4iMA4iOIj+IjAIiPiI/iIwCIj4iP4iMAiI+Ij4iPAIiPiI+IjwCIj4iPiI8AiI8gPoqPACA+Ij6KjwAgPiI+io8AID4iPiI+AiA+Ij4iPgIgPiI+Ij4CID6C+Cg+AoD4iPi4Pu3Zc2tZbto0t0TDhfDru+/OJJP2DQB58OKLPwbHheOZZ/QmxMfCUFs7c999P1mf99wzc/y4HQNAASVI2RHxsXATpOwIQKElSNkR8bFwE6TsCEChJUjZEfGxoBOk7AhAQdmzR3ZEfAQAYK3i4wulf9v86z8Z+Rph/7tHAqyEhqVhUSjxMdwhJqemE+np0dTUYHyqdyxzM5ZpG5psGpi81puu605f6py48P1EdVvqbGuqoil54nryi/rEv68m/lEXP1gb//vF8T9/NfzHo82//evXG2oV/fO7+NH6xLGGxPHGxKnmZGVLsupGqro9db4jVXNzorZr4kpPur4vfX0g3TI42TY8GfZq91imf3xqKDEVS03F09OpyenM1K397x4JsBIaloaF+Gg1Wo0A4qOGhfhoNVqNAOKjhoX4aDVajQDio4blTig+Wo1WI4D4qGFpWIiPViOA+KhhaViIjzlH2cddc7elvbzMagQQHzUsDQvxMefYea59/sZ0nXvBagQQHzUsDQvxMcd4u2b2YVxN4+yaHPx4p9UIID5qWBoW4uPPjvKquUU4d0ZgzU4HWI1rqbu7+8CBA9OzpmZlL9szisuGqrKGpWEhPkYxPmy8dRtmTwG8UD44f9lqLD47duzYtGnT/v37Jycn0+l0+JnJZLJNyM5RXDZIlTUsDQvxMboTAdkHcHOvKVmj0wFW41oKDSYejz/00EMlJSUPPvjgRx99FH5NJpMTExOhCckZissGqbKGpWEhPkZ4IuAn72hbm9MBa7wap1ffnc5hLeccuksmk6mqqir5wQMPPLBv375YLBaa0HrPGYpbxMVV5WirrGGJj4iPEZ0IWGxNTgdEuBpzHMoPHDjwxKxfrI7siaT5U0hLTmPhHML2mVkr3D5Cjz/++GOPPfbwww+XLHD//ffv3bt3ZGSkoHJGuO1lZWXL9mnFXY/FVeX8VlnDEh8RH6M5EbCkqg/X02rM8QKgysrKXbt2vfXWW6WlpTt37vx91I4fP549hZROp8M0lp3DyZMnw8apVGqF20c15zfffHPHjh3bt2/ftm1bySLzHSiRSOSY2JrZvXt32AlhGrlf3aW467G4qpzfKmtY4iPiYyQnAm5beHN/nKkpX0erMXsoX7L9lJWVzT9q37p166OPProlUuGQPTAwMDw8PD4+Hh76L3nUXjiHDz74YGhoaP6pgmW3j3bOjzzyyObNm0uW8txzz507dy7cluwNyePTVOH/Zp/jCdNIzVLcoimuKue9yhqW+Ij4+H+NubetzTS+vfQjvNv/XsirMRwuQ/uZnJy87VxSuFxZWVlaWhoeu7/xxhuvv/76a6+99uqrr26LzsGDB9va2rq6ukJHCe1k2TkcOXKks7Ozp6dnhdtHO+dXXnnl+eefv63rPPXUU59++un58+evXr3a3t4e2k92YqH95CtY7Nq169SpU4lEYnyW4hZNcVU571XWsMRHxMcoTgQsftD2w+tLVvt0QISrcXR0NHvK5rYH3OFyJpMJbSkWi3V3d7e2tl67du3KlSt1dXWXoxCuJxyvGxoaQvvp7e0dGxvLPYfQcsKWYRrhEN/X17fs9pHPuaKi4t57753vOk8++eS+ffs+++yz8vLy06dPX7hw4fr16+Gfhv2ZffYiX8EidL6wB8L+CTtBcYupuKqc9yprWOIj4qNvoJ9bjeEwnbv3jIyMdHV1tbS01NfXZw/i30YhXE/oCqH33LhxI9t7Fp8zWjiHcFgPW4ZpzPee3NtHPuctW7Zku87TTz+9f//+I0eOHD58uJDjY9gJiltMxVXlvFdZwxIfER+txh9PXieTycVvOcx+2kU4jIajfH9/f0dHRziUNzY2hiNsQxTC9YRra21tvXnz5uDgYDweX7L/LZxDZ2dnmEZoKivcPsI5v/POO6HrPPvss0ePHj179uyJEyfChc8///zYsWOh8RTUyevQfcMeCNMIO0Fxi6m4qpz3KmtY4iPio9X4k7fOLPka9uyTHKEzxWKxcFTt6enpmtUZhXA94YF+b29vaCShVYRp5J7D6Ojo0NBQmEb4uZLtI5xzbW3tyy+/XF1d3dTUVFdXFzrNmTNnKioqKisrwx8vXboUelvocwXy1pnw37NPTeV+i6virrviqnLeq6xhiY+Ij1bj3GrMfvDHkp/BtrBLZZ/nGI1aOFgnEokcn7i2cA5hyzCNlW8f1ZxDGxsZGQmtJfShbPu5ePFiTU3N5cuXGxoa2tvbQwctnM92md8DWYpbTMVV5fxWWcMSHxEfrca51Zjj83vnD+XZj5dLr44czW/xHJb9jOLVmHNodclkMrSxwcHB0H5aW1ubm5vDz46OjmzXKbRPlp7/pg3FLb7iqnIeq6xhiY+Ij1bj3Xxp4VSk1uYbzyKZ6vw7FUL76ZsVLhTZlxYqbvEVV5WjrbKGJT4iPlqNVuPdvNQsNJvx8fHsN20UTbZQXMVV5ZVcj4alYSE+Wo1W4x23n/mzabm/KQ7FpSirrGFpWIiPVqPVeMftZyUvNUNxKdYqa1gaFuKj1Wg1AoiPGhbio9VoNQKIjxoWxR0ff/mbvRtqFRXaCPvfPRJgJTZ4w/rde7/a/v5Ww1ibsffQS7niIwBQ+EJHv/V9mVMT6clkKj2WmIjFU0Njif5YvGd4vHNo7PuB0Rt9seaekcbu4WudQ1c7Bi63919q6/umtfd8c3d1Y1fV9c4z9R0VV9pPfNv6RU3Tv843HK7+7hM5qQhGXdt/6jtOh/qGKjd1/7el56sbvV+H0oc7QMfAt52DV7qGvusebugdaeyPtYT7yeBY+9D4zZF412iidyzZP54aSkyMhDvVxGQ8nUllptLT01PhasVHABAfxUfxUXwEAPFRfBQfxUcAQHw0xEcAQHw0xEcAQHw0xEcAQHw0xEfxEQDEx40SH9/7pn3R/vvykPgoPgKA+Cg+LjkONS+5C9srD4mP4iMAiI/i48/Fx8FP3sv+5eSX2X3Y+81L4qP4CADio/i4XHx8/w9XxUfxEQDER/HxDp99dPJafAQA8VF8XOlrH4s2O4qPAID4uEpvnXHyWnwEAPFRfFzRax/nA2VxfnyP+AgAiI8Rx8fthz7pvfWn4jyFLT4CAOKjZx/FRwBAfPTaR/ERABAf18mXFnrntfgIAOKj+GiIjwCA+GiIjwCA+GiIjwCA+GiIjwCA+GiIj+IjAIiP4qP4KD4CgPgoPhriIwAgPhriIwAgPhriIwAgPhriIwBQsN7+yzNykrFmI9zfxEcAAO6e+AgAgPgIAID4CACA+AgAgPgIAID4CAAA4iMAAOIjAACr439BzfyB9IvROgAAAABJRU5ErkJggg==)
Figure 17: Temporal entity A ends before or with the start of temporal entity B. Here A is shorter than B