the parcel fabric , tell how it works ?
The parcel fabric is a fancy name for the map of a group of properties in ArcGIS (the Local Government Information Model must be enabled to use parcel fabrics, since it is designed for local governments to keep track of property lines etc.)
When I leave my house to walk my dog, I first have to leave my property (bounded by fences and the street etc.), then walk along the sidewalk, passing my neighbor's house, and so on until I walk my dog around the block. All the houses I walk past are part of a subdivision (in the case of my neighborhood).
If I go to the City Planning & Zoning Department, I can look at the parcel maps for me and my neighbors. The maps were originally put together by a surveyor, and all the lines that make up the various properties were either surveyed or calculated from surveyed points and (for the pre-AutoCAD world) drawn by a survey draftsman.
If through some magic GIS mumbo jumbo I convert these parcel maps so they appear in ArcMap, they may now be called a parcel fabric.Each of the corners of the properties has an x & y location (using coordinate geometry), and also a z elevation (because the subdivision is not perfectly flat). It is called a parcel fabric because just like throwing an imaginary giant cloth (the "fabric") over the subdivision, it would be bumpy and have various elevations, but would also show the horizontal extent of the subdivision - you could draw the property lines on the fabric.
In summary, the parcel fabric is a map of a subdivision or other cadastral entity that is electronically stored in the GIS. Once the parcel fabric is stored, you can perform analyses on it, you can change the position of stuff in it (e.g. move a property line 1 foot north) etc. (but this change would also be tracked by the parcel fabric, so it's not purely just a map).
Retrieving data ...